If you don’t like the default templates in Sketchup’s Layout program, I have created a couple of extra titleblock templates in Layout for people to download and use.
They are made specifically for A1 paper size (and half-scaled A3 paper) and I have used reasonably generic fonts (Arial, etc.) for cross-platform compatibility.
I have also used Auto-Text cells where appropriate for filling project details, automatic page numbering, dates, etc. If you would rather not use Auto-Text, then just modify the cells with your own custom text to maintain the formatting.
If you want to use these title blocks as templates, place the files into a folder on your computer and then in Layout go to Preferences and choose Templates where you can add the folder path as a place Layout will search for templates. Make sure to customise your details, logo, etc. first so that you don’t have to fix those items every time start a new document!
Download them HERE. They are free for you to use and modify as you see fit.