You right click or do a two finger click on the tool bar and click customize toolbar. Then right click or a two finger click on a random icon, you get to choose it. Then click the option to add it after your right click or do a two finger click on the icon. Then you can add it up top on the toolbar wherever you want. Then you add it drag out the grammarly icon, a little cloud should appear. Then let go of the mouse. You can get rid of the icon you added using the same method but you dont have to, you get to chooses that. There are many other icons you can add. Then press done. When you are done, the grammarly icon is still saved, but it will not show on the toolbar. I hope this helped. I know its been a year but I just figured this out playing with the toolbar customization. I serched this up looking for an answer finding this, hoping for it to help me, but then I figured it out and decided to help.