From FreeCAD Documentation
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- When a Draft or Arch command requiring point input is active, the maximum distance at which Draft Snap Grid detects the intersections of grid lines can be changed on-the-fly by pressing P (increase key) or M (decrease key). This setting is stored: Tools → Edit parameters... → BaseApp → Preferences → Mod → Draft → snapRange. It can also be changed in the task panel of the Draft SelectPlane command.
- To only snap when the Snap modifier key is held down:
- Deselect: Edit → Preferences... → Draft → Grid and snapping → Always snap.
- The default Snap modifier key, Ctrl, can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap modifier.
- To only show the Draft snap toolbar when a command is active select: Edit → Preferences... → Draft → Interface → Only show the Draft snap toolbar during commands. introduced in version 0.22
- The snap symbols can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap symbol style.
- The color of the snap symbols and the dimensions of Draft Snap Dimensions can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap symbol color.
- The size of the snap symbols depends on: Edit → Preferences... → Display → 3D View → Marker size. introduced in version 0.22
- The mentioned single character keyboard shortcuts can be changed: Edit → Preferences... → Draft → Interface → In-command shortcuts.