Pinch in over your drawing to save it and enter the browser
Tap on "+" to create a new drawing
Tap the gear icon in a new drawing and choose a paper grain and color
Move the drawing to the trash icon
Find your deleted files then choose to put them back to your folder or to delete it definitively
Swipe with two fingers to duplicate your drawing
Tap on the folder to close it
Swipe left and right to browse your folders
Tap on the outlined folder to create a new one
Tap folder name to edit
Tap the gear button to customize
Move folder down to trash