The Mail app on iPad works just like iPhone Mail — there’s no HTML signature field, so you email the signature to yourself, copy it, paste it into Settings, then use the shake to undo trick to fix the sizing.
1Get your signature into an email
- Design your signature in Mirosign and install it in a desktop app first (Apple Mail, Outlook for Mac or Thunderbird).
- Send yourself an email so it contains your signature.
2Copy the signature
Open the email in the Mail app on your iPad. Press and hold on a plain piece of the signature text (not a link), tap Select All, then Copy.
3Paste into Mail settings
Open the Settings app, go to Apps → Mail → Signature (older iPadOS: Settings → Mail → Signature). Choose All Accounts or Per Account, then press and hold to Paste.
4Fix the sizing
The signature may first look oversized. Shake the iPad (or use a three-finger swipe left to undo); tap Undo Change Attributes and it snaps back to the correct size. Compose a new email to check it.