Preferences

Performance Tab

An octree can hold massive volumes of data. Therefore, not all octree points will be rendered at the same time. The following three parameters control the total number of octree points that are rendered in each frame. They are crucial for viewport performance and visual quality.

Memory cache (in GB): Determines the size of the CPU memory reserved to hold octree points.
GPU cache (in GB): Determines the size of the video memory reserved to render points.
Minimum coverage: Octree cells with a projected size on screen below this threshold are not rendered.

Settings Tab

Display

Point size is the screen-space size of curve vertices (when in edit mode) and point objects.
Font size is the screen-space size of annotations and DXF text entities.
Line thickness is the screen-space thickness of curves.
Highlight thickness is the screen-space thickness of highlighted objects.  
Depth offset: Point clouds and meshes might obscure CAD objects on them. Increase this value to bring CAD objects visually to the front (coordinates are not changed).
Point cloud selection highlight: By default, point clouds are not highlighted when selected. To toggle highlighting, check this box.
Curve direction: Toggles visibility of curve directions.

Colors

Layer color: Default color of group objects
Line color: Color of ungrouped curves
Text color: Color of ungrouped annotations
Point color: Color of curve vertices and ungrouped point objects
Highlight color: Highlight color of selected objects

General

Snapping tolerance: Snapping distance in screen-space size for drawing, editing, and object manipulation.
Undo list size: The number of actions that can be undone.

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