in the palm of (your) hand

under your complete control.

The audience was fascinated — he held them in the palm of his hand.

• put a price on something
• put a price tag on
• put a price tag on something
• put a quart into a pint pot
• put a rocket under
• put a rocket under someone
• put aside
• put aside something
• Put a sock in it!
• put a spanner in the works
• put a spoke in someone's wheel
• put a spoke in wheel
• put a spotlight on
• put a spotlight on someone
• put a spotlight on something
• put a stop to
• put a stop to something
• put at odds with
• put at odds with someone
• put away
• put away someone
• put away something
• put back into
• put back into something
• put back on the rails