This toggles the pivot lock mode. The pivot is the point that serves as the origin for transformations. Usually it is calculated automatically based on the current selection, but by clicking this button, the user can lock the pivot and edit it coordinates manually in the next three panels.

When the snap-to-grid button is checked, a selection can only be translated in increments of the current grid spacing.

This option allows users to position the 3D cursor at nodes of the geometry.

This toggles all visible objects and parts. (Or elements when in mesh selection model.)

Zoom to the current selection.

Zoom to the extents of the current model.

Toggle Mesh Lines