Pro tip

find a hashtag you like

tap on the tag inside toots or search using the search function above the toot text input field

tap the top right of the new column that shows far right and pin the column

you can the add other tags you come across in that pinned column or repeat the pinning process to create another pinned column for tags

you can arrange columns as you please using < and > which shifts columns

use "Dark Reader" extension/add on you can change your CoSo theme