Preselect is a utility add-on that enables rapid face selection across both object and edit modes. Originally designed to accelerate workflows for the Random Flow add-on, it provides several hotkey-driven selection methods that can be applied to general modeling tasks.

The tool includes operations for selecting linked flat faces based on a sharpness threshold, isolating entire face islands separated by boundary edges, and grabbing coplanar faces that share the same planar height. It incorporates a visual overlay system directly in the viewport during object mode, highlighting selected faces in blue and deselected areas in red to streamline bulk operations or procedural mesh generation.