Paginated Advancements completely overhauls the advancement screen by adding a load of features:

• Makes the screen bigger, instead of a fixed size
• Adds Pagination (no "this modpack has too many tabs to display them all" anymore!)
• Pin the advancement tabs you are currently focusing on
• Remembering the last opened tab

Also adds some styling options, to make the screen exactly how you prefer it:

• Disable background fading
• Configurable Spacing between tabs. Allowing them to be condensed quite a bit, or giving them more room to breathe

With version 2.0 comes the ability to register new advancement frames, including custom colors, via data pack / mods that support it. Find out how in the Wiki