Can I split a PDF file?

Why not? You can split and merge as well.

Do you want to split 100 pages of single PDF file into 10 separate parts (Split)?
OR
Do you want to add 10 PDF files into one PDF file (Merge)?

Click here to download and PdfMerge Application. It's easy and effective.

Do you know the short cut keys to set In and Out points in Adobe Premiere?

Setting In and Out points in Adobe Premiere (for all versions)

Use these shortcuts in the Monitor, Timeline, or Clip windows.
RESULT	ACTION
Set In point at edit line	I, E, or Ctrl + Alt + UpArrow
Set Out point at edit line	O, R, or Ctrl + Alt + DownArrow,
Clear In point	D
Clear Out point	F
Clear both In and Out points	G
Go to Clip In point	Ctrl + UpArrow
Go to Clip Out point	Ctrl + DownArrow
Go to Timeline In point	Q
Go to Timeline Out point	W