Eraser Tool Properties

The Eraser tool allows you to erase artwork by drawing eraser strokes over it. When using the Eraser tool with a tablet, it is pressure sensitive, like with the Brush and Pencil tool.

NOTE: For tasks related to this tool, see About the Eraser Tool.

Eraser Properties

The way the Eraser tool is configured is almost identical to the way the Brush tool is configured.

Property Description
Stroke Preview Area

The Preview area lets you see a preview of the stroke your drawing tool will make.

Preview Stroke

Eraser Properties Dialog

The arrow button right of the display area opens the Eraser Properties dialog, which gives you access to all the parameters and options for your eraser. The Tool Properties view only gives you access to a few of the eraser properties, a list of eraser presets and options for the Eraser tool that are not related to the eraser properties. For more information on the Eraser Properties dialog, see the Eraser Properties Dialog section below.

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Maximum Size

Defines the maximum size of the eraser.

If the tool is used with a pressure sensitive pen tablet, the width of the stroke will vary between its maximum size and minimum size depending on the amount of pressure used. If used with a mouse, the width of the stroke will always be its maximum size.

Smoothing

Defines the number of control points added to the centre line. The fewer the control points the smoother (but less faithful) the line.

Flow

Lets you set the opacity for each instance of the eraser tip that gets erased from your artwork. Contrary to the Opacity parameter, the flow parameter has a cumulative effect. This means that a lower flow will make your eraser strokes less effective towards its extremities and more effective in its center. Your stroke's flow will also accumulate if you draw over it. By default, your eraser's flow varies with the amount of pressure you put on your tablet pen.

NOTE: This option is only displayed in the Tool Properties view when drawing on a bitmap layer.
Opacity

The Opacity parameter are where Lets you set the opacity of your brush strokes. Contrary to the Flow parameter, the Opacity parameter is non-cumulative. Your whole brush stroke's opacity will not exceed the Opacity parameter. By default, the Opacity parameter varies depending on the amount of pressure you put on your tablet pen.

NOTE: This option is only displayed in the Tool Properties view when drawing on a bitmap layer.

Eraser Presets

These options allow you to select, create and manage eraser presets.

Icon Property Description
  Presets list

By default, Storyboard Pro has preloaded eraser presets. You can also create your own eraser presets by configuring your eraser, then saving its properties into a new preset. It is also possible to export and import eraser presets.

New Brush Preset

Creates a new preset based on the current tool properties.

Delete Brush

Deletes the currently selected preset.

  Rename Brush

Allows you to rename the currently selected preset.

  Import Brushes

Allows you to import brush presets exported from Storyboard Pro.

  Export Brushes

Allows you to export your brush presets into an .xml file.

  Small Thumbnail  Displays presets in a grid of small thumbnails with a preview of their tip.
  Large Thumbnail  Displays presets in a grid of big thumbnails, with their name and a preview of their tip.
  Stroke View

Displays presets in a list, with their name and a preview of a stroke done with each preset.

Eraser Properties Dialog

Erasers have an extensive set of options and properties that are not displayed in the Tool Properties view, but rather, in a dialog you can access from it. To open the Eraser Properties dialog, click on the arrow button right of the stroke display area.

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The Eraser Properties dialog has five different tabs, minus the Smoothing tab if you are working on a bitmap layers. Below is detailed information about the options available in each tab:

Tip Tab

The Tip tab allows you to configure the shape, size, hardness and spacing of your eraser tip.

Property Description
Eraser Type

Allows you to select between one of the following eraser types:

  • Solid Vector: Simply cuts out the eraser stroke's shape from the vector artwork. A solid vector eraser always completely erase the artworks leaving hard seams.
  • Textured Eraser: Allows to configure the eraser with the same options as with a textured brush. A textured eraser will decrease the opacity of bitmap textures in textured brush strokes if it doesn't completely erase it. If it completely erases a brush stroke, it will cut out the erased part from the vector artwork.
  • Textured, Preserve Vector: Like a Textured Eraser, except that it will not cut out from the vector shapes, even if it fully erases pixels in a textured brush stroke's texture.
NOTE: Textured erasers only work as expected on textured brush strokes. Using a Textured eraser on a solid vector brush stroke or on a pencil line will only cut the eraser stroke's shape out of it. If you use a Textured, Preserve Vector type eraser on a solid vector shape or on a pencil line, the eraser will not erase anything.
NOTE: This option is not available when working on a bitmap layer. With bitmap layers, erasers are always textured, and textured eraser options are always available.
Eraser Tip Library

This is where you select the shape of the eraser tip. By default, it is round. Note that some tips are designed to have semitransparent areas, even when the maximum eraser opacity is set to 100%.

To create a custom eraser tip, you must prepare the file ahead of time, either in Storyboard Pro or in a third-party software, such as Adobe Photoshop. Colour is not supported and transparency is not supported in the traditional sense. Black appears as 100% opaque, white appears as 100% transparent and all the shades of grey in between appear as varying degrees of semitransparency. A range of file formats are supported—.jpeg, .png, .tif, .psd, .tga to name a few. Alpha channels are disregarded on import. It is recommended that your file be between 100 x 100 pixels and 400 x 400 pixels.

You can also import eraser tips that you exported from Storyboard Pro, so you can share them with colleagues.

Minimum and Maximum Size

The minimum and maximum sizes of your drawing tool produce the thick and thin effect on your stroke. This works with the pressure sensitivity of a pen tablet.

  • Maximum Size: Defines the maximum width of the stroke.
  • Minimum Size: Defines the minimum width of the stroke in relation to and as a percentage of the maximum size.
NOTE: Setting the Minimum Size value to 100% eliminates the possibility of creating width variation on your stroke. In other words, you would be forcing a uniform line width using the Maximum Size value.

Roundness and Angle

The Roundness and Angle parameters allow you to change the shape and orientation of the tip.

  • Roundness: The vertical scaling to apply to the tip. Reducing this setting squashes the tip vertically, allowing you to turn round or square tips into flat tips.
  • Angle: The angle at which to rotate the brush tip, counterclockwise.
NOTE: The squashing is not relative to the angle—if the tip is rotated, the squashing will still be done relative to the tip's original orientation.

Hardness

The Hardness and Spacing parameters allow you to change the softness and spacing of the marks made by the eraser tip. You can preview the hardness and spacing at the top of the Eraser Properties window, stroke preview area.

The hardness value corresponds to the softness of the eraser tip's edges. The lower the value, the softer the tip edge. The higher the value, the sharper the tip edge. Be aware that some eraser tips are not 100% opaque, so they will always appear somewhat soft, even at 100% hardness.

Spacing

Defines the amount of space between each stamp of the eraser. A value of 100% sets the stamp marks edge to edge, if there is no white space around the shape. The larger the value, the greater the space between marks. A really large value can make the eraser stroke appear as a string of individual marks. Conversely, a small spacing value will give the appearance of a fluid brush stroke.

Spacing is only evident when making a continuous stroke.

Randomness

The Randomness parameters let you create a varied bitmap eraser stroke. Refining these options can give your stroke a lovely, non-mechanical look.

Random Size

You can create variation between the thick and thin of your eraser stroke just by setting the Maximum and Minimum Size values. If you add randomness to the mix, pressure sensitivity from your drawing tablet will still be applied. Light pressure will create random values around the minimum, while heavy pressure will create random values closer to the maximum. The larger the percentage, the larger the range of random variation.

NOTE: Setting the Minimum Size to 100% eliminates the possibility of creating width variation on your stroke, whether you are applying randomness or not. Therefore, you would be forcing a uniform line width using the Maximum Size value.
Random Angle

Sets the range for random rotation around the set Angle value. For example, if the Angle is set to 45° and the Random Angle set to 10°, the software will choose values between 40°–50° (plus or minus 5 degrees, equaling a total of 10 degrees).

Random Spacing

Sets the range for random spacing around the set Spacing value. For example, if the Spacing is set to 50% and the Random Spacing is set to 10%, then Storyboard Pro will choose values between 45%–55% (plus or minus 5 percent, equaling a total of 10 percent).

Smoothing Tab

The Smoothing tab contains options to configure how Storyboard Pro should automatically smooth your eraser strokes as you paint.

NOTE: The Smoothing tab is only available when working on a vector layer, as bitmap layers do not support smoothing.
Property Description
Centerline Smoothing Defines the amount of smoothing Storyboard Pro should perform on your eraser stroke's direction, curves and corners. A higher setting will prevent your line from being shaky, but is liable to reduce drawing precision and turn sharp angles into curves.
Contour Smoothing
  • Defines the amount of smoothing Storyboard Pro should perform on outer contour of the eraser stroke. A higher setting will round sharp corners and reduce the amount of control points for the resulting vector shape.
  • Transparency Tab

    The Transparency tab allows you to decide if your eraser has antialiasing as well as to set its flow and opacity settings.

    NOTE: The Transparency tab's options are only available on vector layers if the Eraser Type option of the Tip tab is set to Textured Vector or Textured, Preserve Vector.. On bitmap layers, those options are always available.
    Property Description
    Antialiasing

    Enabled by default. This option causes the contours of the eraser strokes to blend with the surrounding colours, to create an illusion of smoothness otherwise not possible due to the picture resolution.

    If antialiasing is disabled, the eraser will either fully erase pixels or leave them intact.

    NOTE: When disabled, all other options in the Transparency tab are disabled.
    Maximum and Minimum Flow

    The Maximum and Minimum Flow parameters let you set the range for the rate at which your eraser's effect flows. The greater the flow, the more consistent the effect is. If the flow is light, then the effect may look spotty. This feature works with the pressure sensitivity of a pen tablet.

    • Maximum Flow: Sets the maximum rate at which colour and texture are applied as you create a fluid stroke.
    • Minimum Flow: Sets the minimum rate at which colour and texture are applied as you create a fluid stroke. It is defined as a percentage of the Maximum Flow value. If the Minimum Flow value is set to 100%, then tablet pressure sensitivity will no longer be applicable. The flow will be set to the constant rate of the Maximum Flow value.

    Maximum Opacity and Minimum Opacity

    The Maximum and Minimum Opacity parameters are where you set the opacity range for a eraser mark. This works with the pressure sensitivity of a pen tablet.

    • Maximum Opacity: Sets the transparency limit of the eraser mark when the pressure is heavy.
    • Minimum Opacity: Sets the transparency limit of the eraser mark when the pressure is very light. It is defined as a percentage of the Maximum Opacity value. If the Minimum Opacity value is set to 100%, then tablet pressure sensitivity will no longer be applicable. The opacity will be set to the constant rate of the Maximum Opacity value.

    Randomness

    Th Randomness parameter lets you set the range for the randomness of the flow and opacity. This works with the pressure sensitivity of a pen tablet.

    Randomness Flow

    You can create variation in the flow of your eraser stroke just by setting the Maximum and Minimum Flow values. If you add randomness to the mix, pressure sensitivity from your drawing tablet will still be applied. Light pressure will create random values around the minimum, while heavy pressure will create random values closer to the maximum. The larger the percentage, the larger the range of random variation.

    NOTE: Setting the Minimum Flow value to 100% eliminates the possibility of creating flow variation on your stroke, whether you are applying randomness or not. That is, you would be forcing a uniform flow using the Maximum Flow value.
    Random Opacity

    You can create variation in the opacity of your eraser stroke just by setting the Maximum and Minimum Opacity values. If you add randomness to the mix, pressure sensitivity from your drawing tablet will still be applied. Light pressure will create random values around the minimum, while heavy pressure will create random values closer to the maximum. The larger the percentage, the larger the range of random variation.

    NOTE: Setting the Minimum Opacity value to 100% eliminates the possibility of creating opacity variation on your stroke, whether you are applying randomness or not. That is, you would be forcing a uniform opacity using the Maximum Opacity value.

    Dual Tip Tab

    The Dual Tip tab lets you set the parameters for creating a dual tip eraser. The primary bitmap eraser tip and the dual tip always work together. You can set the parameters for the primary tip in the Tip tab and those for the dual tip in the Dual Tip tab. The Blend mode you select determines how the tips are combined.

    By default, the Blend Mode is set to Multiply and the Random Angle to 360°.

    NOTE: To use a Dual Tip, you must enable option by checking the checkbox inside the Dual Tip tab. Additionally, if you are working on a vector layer, the Eraser Type option of the Tip tab must be set to Textured Vector or Textured, Preserve Vector.
    Tool Name Description
    Enable/Disable The checkbox inside the tab allows you to decide whether or not your eraser uses a dual tip. If this checkbox is unchecked, the options in the Dual Tip tab will be disabled.
    Blend Mode The Blend modes let you decide how the primary tip and the dual tip are combined.

    Multiply

    This is the default blend mode. When the two eraser tips are combined in this mode, they essentially cut each other out in overlapping areas, where one or both tips have an area of 100% transparency. The less opaque the eraser tips are, the lighter their combination.

    Colour Dodge

    In this mode, the primary tip cuts out the shape of the dual tip. Where the tip shapes overlap, within the boundaries of the primary shape, the colour and opacity appear darker.

    Combine

    This mode treats the two tips as two different and separate erasers that have the same colour and follow the same path.

    Paper Texture Tab

    The Paper Texture tab lets you configure a paper-like texture for your eraser. You can also add textures by importing image files, or import paper textures that were previously exported from Storyboard Pro.

    NOTE: To use a Paper Texture, you must enable option by checking the checkbox inside the Paper Texture tab. Additionally, if you are working on a vector layer, the Eraser Type option of the Tip tab must be set to Textured Vector or Textured, Preserve Vector.
    Property Description
    Enable/Disable The checkbox inside the tab allows you to decide whether or not your eraser uses a paper texture. If this checkbox is unchecked, the options in the Paper Texture tab will be disabled.
    Texture Scale Increase or decreases the size of the paper texture.
    Additive

    This option layers the texture on top of itself as you scribble overlapping lines in one continuous stroke. If this option is turned off, areas of overlapping lines from a single, continuous stroke will appear the same, in terms of darkness and texture, as non-overlapping areas.

    Aligned

    This option defines the way separate, overlapping strokes behave. If this option is enabled, the paper texture's position does not change with each sweep of the eraser. If this option is disabled, each sweep of the eraser produces a different texture position. The texture orientation always stays the same.