App thumbnail background stripes in header

henrikalmen — Mon, 15 Sep 2025 15:28:38 GMT

We recently upgraded to QSEoW version May 2025 (from May 2024) and some of the layout has changed.

What's up with the behaviour of the thumbnail displayed on top of the app? It's a square! And if the thumbnail is not a square (and i'ts not supposed to be!), gray stripes are added on the top and at the bottom:

This is caused by this line in qlik's main css: .css-x1voqc {background:#0000000D}

It's possible to override that in a custom theme css, with the exception of the app overview when an app is first opened, since the theme is not loaded there.

This raises questions. Why has the qlik dev team decided to make that thumbnail placement a square (32x32 pixels), when the documentation suggests the proportions 8:5 for thumbnails? (Although those proportions don't seem correct, as I have written about here: Sheet thumbnail dimensions.) And why was it considered a good idea to add gray banners around a correctly sized app thumbnail?

It also raises the question why I can't find other discussions on this topic in the community - I can't be the only one being disturbed by this? But maybe I just didn't search the forum enough. Or I'm just very sensitive...

Re: App thumbnail background stripes in header

hooram95 — Mon, 05 Jan 2026 14:44:13 GMT

Yeah, that square thumbnail change really feels odd, especially when the docs suggest a totally different ratio.Those grey stripes make everything look unfinished on app , so it’s definitely not just you noticing it.

topic Re: App thumbnail background stripes in header in App Development

App thumbnail background stripes in header

Re: App thumbnail background stripes in header