How do you select all notes in Logic Pro X?
Click the key on the keyboard at the left edge of the Piano Roll Editor. To select all notes for a range of pitches, Shift-click or drag over a range of keys on the keyboard.
How do you select everything to the right in logic?
Press Option-K and type Select in the Search box. Try Select All Following (Shift-F), or Select All Following Of Same Track/Pitch and couple it with Invert Selection (Shift-T).