Use the "switch character" link and reload the page if you want to use a different character (the character panel doesn't need to be open, just the front page)
Click on the bookmark and it will show a prompt like in the screenshot (it will complain if you're not logged in or if it's a different location); copy the text in the prompt by pressing Ctrl+C
Go to the equipment planner spreadsheet and press File—Make a copy… or File—Download as to be able to edit the values or go to your copy if you've already copied it
Select the upper left cell that says "Ctrl+V" and press Ctrl+V to update the item values
Fill out the attributes and resistances from passives (PoE passive skill tree planner is a great tool to find out the exact values for your build, just import your skill tree into it)
Change the attribute or resistance requirements, missing attributes or resistances will be highlighted
How it works
The bookmarklet is a small script that fetches the items for the current character and formats them for pasting into the equipment planner spreadsheet.
