If the Freeze button is not visible, you can
Name field: Enter a name for the bounce file in the field. The name defaults to the region name of the first selected External Instrument.
Note: Projects created and last saved in Logic Pro for Mac version 9 or earlier (with the filename extension .logic) don’t appear in the New Project Chooser in Logic Pro for iPad and can’t be opened.
Download the guides:
Logic Pro User Guide: PDF