@PamPurrs You are using the zoom U-44 aren’t you?
You have an LED for “Clip Sig”… but no little levels graphs. I have the zoom H6. It has levels graphs so I can set the gain on the Zoom till the signal form the mics is just “below the red” on the Zoom like @gcancella suggested.
You will need to adjust the gain on the zoom U-44 down till the “Clip Sig” doesn’t flash on in your loudest bits. Then go down a little more to give yourself some headroom.