How to?

How do I export to Sketches for Mac

More menu > Export > Mac

Select Dropbox or iCloud.
On the Macintosh, you will find the file either in the /dropbox/Applications/Sketches Folder or in iCloud Drive.

How to import photos

More menu > Import > Photo

Choose a picture > Resize, move and rotate.

How do I copy and paste between drawings ?

More menu > Export > Copy

More menu > Import > Paste

How do I post to the Sketches community ?

More menu > Export > Community

Personnalize > accept the license > it's online!

Settings panel > Sketches community tab > Vote