RC16 - format bar has changed size

Today I find that the format bar has changed its layout. The first box which displays the styles dropdown has grown to take up over half the width of the editor window.

The result is that all other formatting options are pushed to the right and the list button which I most frequently used is now on the extreme right whereas it used to be far more central.[attachment=0]Screenshot 2021-01-30 133107.png[/attachment]

There is nothing in the styles list which justifies the size of that box - Heading 1 is the longest description.

I have no idea what I might have done to cause this change. Does anyone have a suggestion how to redimension it?

I’d try going into View ▸ Customize Toolbars…, maybe add something incidental, click Apply, and next clicking the “Restore Defaults” button for the Format Toolbar, before trying to figure it out any further.

I don’t think there is anything that would do that on purpose.

Thanks AmberV, that did it. I still don’t know what I did -but all back to normal.