Cut, Copy and Paste Text - Samsung Galaxy Tab 2® (10.1)
Not all text fields support cut / copy.
Touch and hold the source text field (the text to be copied).
Adjust the selection by dragging the appropriate flag to the desired position then select Cut / Copy (located in the upper right). To select the entire string of text, select Select all (located in the upper right).
Select and momentarily hold the destination text field (where the text should be pasted) then select Paste.