Zooming:
1) hold Ctrl
2) move mouse upwards (zoom in) / downwards (zoom out)
Hotkeys:
E ? upgrade
Q ? inventory
Shift Q ? material inventory
Shift P ? export save in .hx2 format
Shift S ? manual save:
Shift C ? convert all ores your have into cash
Shift ? build multiple buildings without having to open the build panel again (if in inventory, lets you use/throw all items at once)
Delete ? enters ?Destroy mode?
A ? view achievements (also submits highscores)
D ? selects buildings of same type
Esc ? deselects selected tiles, gets rid of mining prompt, exits destroy mode, closes all open panels
- (hyphen) and + (plus sign) ? navigate quickly through planets/solar systems/etc.
C ? select the center tile(s) of a planet
How to use the S hotkey:
1) Hold S
2) Click a tile and release S
3) Move mouse to select the tiles you want
4) Click tile to confirm selection
This technique can also be used to build multiple buildings or use multiple items at once.