Selecting data

A-B select

Click somewhere in a view to set the cursor to that location. You can then press shift+1 in View mode to set the A point of a selection, and shift+2 to set the B point of a selection. Once you have both an A and a B point, the selection is the region spanning A and B.

Select all

You can select everything in a view with Edit->Select all in view or Ctrl+A.

Mouse drag selection

Click a byte and drag the mouse, releasing it when the desired region is selected.

Mouse block multi-selection

Hold down left Alt and draw a rectangle with the mouse to select a block.

Unselecting

You can press the clear button in the top bar, or press Esc.

Screenshot