by-hand selection subtracting

  1. Choose the hand-draw selection tool

  2. Place it where you want to begin the selection

  3. Click the left mouse button

  4. Dag the cursor along the path of your desired selection

  5. Let go of the mouse and the tool will "close" the selection area.

  6. To subrtact part of the selection, hold down the Ctrl key and select the area you DON'T want of the original selection.

  7. Let go of the mouse and keyboard.