How to add bookmarks and split a PDF using adobe acrobat pro

This video will walk users through how to split a PDF using bookmarks in Adobe Acrobat Pro DC
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[@elmehdielhamdouchi6738]

what to do if the plus icon is not showing?

[@TheAccessibilityGuy]

What version of Adobe are you using?

[@elmehdielhamdouchi6738]

Thanks for your comment...I have the free version and I recently found out that it doesn't support this.