You can bookmark the following:

1. Planet

2. Astronest

3. Space Pirates

4. Pirate Bases

5. Resource Sites

6. Trade Planets

7. Empty Tile

Basically, everything in the galaxy! 

How to bookmark coordinates?

1. Tap the tile. (This will show the X and Y coordinates in green text.)

2. Tap the coordinates '+' icon to open the window 'Add to Favorites'

3. You can customize the name to easily remember that planet by tapping the text box.

4. Select the category - Ally, Enemy or Others then tap Save.

How to send the coordinates to your Chat Window?

1. Tap tile then coordinate's '+' icon

2. Tap the Share Icon