Custom Canvas Size seems Broken

​@sydneypemberton it sounds like you’re hitting a frustrating loop while trying to set up your poster dimensions, but based on your description and the screenshot, there are a few likely culprits for why the settings aren't sticking. One common issue in Lucidchart is that the "Custom Size" fields often require you to press Enter/Return on your keyboard immediately after typing the number. If you simply click out of the box or move to the next field, the software may revert to the previous default value of 11 inches. Also, the flickering you're seeing in the Format selector suggests a potential conflict between the manual dimensions and the "Page Tiling" logic, or perhaps a minor browser rendering glitch.

To resolve this, I recommend first ensuring that you press Enter after each dimension change to "lock" the value in. If the menu continues to behave erratically or keeps flipping between settings, it would be helpful to know which browser and device you are using, as extensions or a full browser cache can sometimes interfere with the menu. You might also try toggling the Infinite Canvas setting on and then back off again to reset the canvas boundaries before entering your 24x36 dimensions. For more information about these controls, you can refer to the official Adjust document and board settings article.

 Hi ​@sydneypemberton,

Thank you for posting in the Lucid Community! ​@Shira M, thank you for the amazing support and suggestions you've already shared.

​@sydneypemberton, have you had a chance to try any of Shira’s suggestions yet?

In order to help us rule out performance issues or specific document glitches, could you please try these steps below:

• Try opening your document in a private or incognito window. For help with opening an incognito window, please see this community post.

• Try connecting to a different network or disconnecting from your VPN (if applicable). Sometimes account performance issues can be related to internet security/speed or browser issues.

• ​@Shira M mentioned toggling Infinite Canvas ON and then OFF again. This can reset manual page boundaries.

• Ensure Custom is selected in the Size dropdown before typing your numbers

If none of these steps above work, could you share a temporary Document Support PIN for this document? This will help me take a closer look at what’s going on. This PIN is safe to post in this thread because it is only accessible by members of the Lucid support staff. You can find steps for generating a Support PIN in this Lucid Help Center article: Generate a Lucid Support PIN.  Thanks for your help and patience!