Keyboard shortcuts

General

CTRL+S - Save current board
CTRL+SHIFT+S - Save current board to new file
CTRL+N - Open new board
CTRL+O - Open board from file
CTRL+E - Export page to common image format
CTRL+P - Print page
CTRL+Z - Undo last action
CTRL+Y - Redo last action
CTRL+SHIFT+Z - Redo last action
ESC - Exit text insert mode / cancel export or print
F1 - Open online help in your default browser
F11 - Full screen / exit full screen

Manipulating objects

CTRL+A - Select all objects on page
CTRL+C - Copy selected objects
CTRL+SHIFT+C - Copy selected objects as image
CTRL+V - Paste
CTRL+X - Cut selected objects
DELETE - Delete selected objects
Arrow keys - Move selected objects / hotspot
SHIFT + Arrow key - Move selected objects / hotspot by larger step
ESC - Release selected objects

Selecting tools

Tab - Next tool
Shift+Tab - Previous tool

M - Pointer
F - Freehand
L - Line
P - Polygon
B - Bezier
E - Ellipse
R - Rectangle
T - Text
S - Shape
I - Image
Q - Equation

Useful Windows shortcuts

ALT + Prt Scr - Copy active window as image. Use CTRL+V to paste image into IDroo window.