In Photoshop paths can be open and closed. If you have a closed path and want to reopen it, do the following:

Use the tool Covert Point (<) for direct selection, select the part of the path you want to delete and press DEL. After this the path is open.

Page numbers in InDesign:

1. Set page numbers on master page(s):
   1. Use text field to place and style
   2. Text > Special chars > markers

Fit page in window = Ctrl + 0

Preview/Display rendering quality:

• Ctrl + Alt + Z = normal
• Ctrl + Alt + H = high

Switch to preview mode:

• W : if not in text mode (to turn on and off)
  or first
• Ctrl + Shift + A = deselect all →  then W