and these are the steps from google 

1. On your computer open a document spreadsheet or presentation.


2. Click Extensions  Add-ons  Manage add-ons.


3. Next to the add-on click Options Use in this document to turn the add-on on or off. 


4.    ( however in the 3 step the only option I have is uninstall there is not " Use in this document "


5.  

Hi @zhyako x thanks for posting in the community! I can see that you have also submitted a support ticket about this and someone from our team has responded. Please continue to work with them to troubleshoot the issue. 

It sounds like your side panel might be hidden in your Google Docs view. Could you please check the bottom right corner of your Google Docs page and confirm if you see a tab with an arrow there? It should look like this screenshot and says 'Show side panel' when you hover over it. 

If you click the tab it should display a panel on the right-hand side of your Google Docs page and from there you should be able to find your Lucidchart or Lucidspark add-ons! 

Please let me know if you are not able to see this or if you have any questions. Hope this helps!