• Accept safe (unilateral) changes:
  This is equivalent to the -as command-line option. Only files that have non-conflicting changes (i.e., present in yours-but-not-theirs or vice-versa) will be merged automatically. Files with changes in both yours-and-theirs will be skipped.
• Accept only non-conflicting merges:
  This is equivalent to the -am command-line option. If there are conflicts, the file is skipped; if there are no conflicts and yours hasn't changed it accepts theirs; if theirs hasn't changed, it accepts yours; if both yours and theirs have changed (without conflicts), it accepts the merge. Files that have no base for merging (e.g. binary files) are always skipped.
• Accept all merges:
  This is equivalent to the -af command-line option. The merged file will be forcibly accepted even if there are conflicts.
• Accept yours (ignore theirs):
  This is equivalent to the -ay command-line option. No merge will be performed; the changes that are yours will overwrite theirs.
• Accept theirs (ignore yours):
  This is equivalent to the -at command-line option. No merge will be performed; the changes that are theirs will overwrite yours. (Note: This implies that any changes made to the file in your client workspace will be overwritten; use this option with care.)

• Force re-resolve of previously resolved files:
  This is equivalent to adding the -f (force) flag command-line option. Normally, once a file has been resolved, it won't show up as requiring further resolution; this option can be used to re-edit a file if the results of the initial resolve weren't satisfactory.
• Mark non-conflicting changes in merged result:
  This is equivalent to adding the -v (verbose) flag command-line option. Markers will be inserted into the file for all changes, not just conflicting changes. The markers must be edited out before the merged file can be accepted.

• ...and subdirectories:
  Files in the specified client path and all directories below will be resolved.

  This is equivalent to the command line:
  p4 resolve //client-path/...

  This is the default option.

• ...at this level only:
  Only files in the specified client path will be resolved. Any files in directories beneath the client path will be untouched.

  This is equivalent to the command line:
  p4 resolve //client-path/*

To include or exclude individual files from the operation, click on the checkboxes for each file, and activate the radio button for the Selected Files option.