MAC: How to Save Selection as HTML in OneNote?

Gem Menu for Mac OneNote 1.0 offer Save As feature, save the selection in Mac OneNote to a HTML file.

Step 1: Select Content in Mac OneNote

At first, select some content in Mac OneNote.

You can use keyboard shortcut to quickly select OneNote content.
Press once ⌘ (command) + A, OneNote will select current paragraph.
Press ⌘ (command) + A again, OneNote will select  the content of current container.

Step 2: Click Gem Menu Save As HTML File

Then, click Gem Menu -> "Gem" -> "Save As" menu item.
It will pop up SAVE AS window, specify the folder and .html file name, finally, click "Save" to save .html file.

Demonstration