because you have a combined network you'll need to do option 2 ww mentioned. in a combined network there are hidden node group names appended to the networks: - appliance, -switch, -wireless, and so on.
so, make a copy of your splash page then edit the continue.html file in there. should be a super quick fix.
first create a new splash page and you can choose copy from your current "modern" page.
![Screen Shot 2021-10-29 at 8.04.29 AM.png Screen Shot 2021-10-29 at 8.04.29 AM.png](https://community.meraki.com/t5/image/serverpage/image-id/20713iCEA99EF4023D6DDF/image-size/large?v=v2&px=999)
Next, click the continue.html file and then the edit tab. Find the line with WELCOME and type whatever you want between the <h1></h1> tags.
![Screen Shot 2021-10-29 at 8.05.25 AM.png Screen Shot 2021-10-29 at 8.05.25 AM.png](https://community.meraki.com/t5/image/serverpage/image-id/20714i75F179363D266CCD/image-size/large?v=v2&px=999)