To provide the fast and progressive work, use the Hotkeys:

Command	Hotkey
New	Ctrl + N
Open	Ctrl + O
Save	Ctrl + S
Undo	Ctrl + Z
Redo	Ctrl + Y
Cut	Ctrl +X
Copy	Ctrl+C
Paste	Ctrl + V
Delete	Del
Select All	Ctrl + A
Zoom In	Num +
Zoom Out	Num -
Font	Ctrl + B
Rectangle Selection Tool	Ctrl + W
Ellipse Selection Tool	Shift + E
Lasso Selection Tool	Ctrl + U
Hue Selection Tool	Alt + H
Color Selection Tool	Ctrl + G
Exchange color	Alt + X
Erase Tool	Alt + D
Fill Tool	Ctrl + Q
Pencil Tool	Ctrl + P
Line Tool	Ctrl + L
Text Tool	Ctrl + T
Rectangle Tool	Ctrl + R
Filled Rectangle Tool	Ctrl + F
Ellipse Tool	Ctrl + E
Filled Ellipse Tool	Ctrl + D