Locking Guides to Prevent Editing Them

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When using a drawing tool with a guide, you are also able to edit the guide's horizon line, vanishing points and other parameters by manipulating them in the Camera or Drawing view. Hence, it is possible to make changes to your guide by accident when drawing too close to one of its visual elements. Once you are done making adjustments to a guide, it is recommended to lock guides to be able to draw freely without having to worry about making accidental changes to your guides.