Mouse controls

In the 3D View

Mouse What it does
Drag Turn the model
Right- or middle-drag Move the model
Wheel Zoom
Click Select what's under the mouse, in the selection mode
Shift+click Add it to the selection, or take it away
Click on nothing Select nothing
Double-click an edge Select its edge loop, in Edges mode

In Edges mode, hold Shift or Ctrl over an edge to see its loop before you pick it.

In the UV Layout

Mouse What it does
Wheel Zoom in or out at the mouse
Right- or middle-drag, or Space and drag Pan
Click Select what's under the mouse
Shift+click Add it to the selection, or take it away
Drag on empty space Box select: Include touching, in Workspace, picks all the box touches
Shift+drag on empty space Box select, adding to the selection
Drag the selection Move it, and with Shift, along one axis only
Drag a corner handle Scale the selection, with Shift keeping its proportions and Alt scaling from the middle
Drag just outside a corner Turn the selection, with Shift in steps of 45°
Double-click an edge Select its loop, up to the island's border, in Edges mode

The cursor shows what a drag will do: a hand over the selection, arrows over the handles. Hold Shift and it stays the pointer, for adding to the selection.

While Relax is on, press and hold an island to relax it.

Between the views

Drag the line between two views to give one more room.