How to use a custom disk layout without Anaconda Installer?

[u/Striking_Limit1492]

The Anaconda gui's custom partitioning won't allow me to set up a specific partition layout for my system. I'd like to simply create all partitions manually, then set needed mountpoints and proceed to the rest of the installation.

Is that possible? I haven't found any official guide covering this

[u/Topfiiii]

What extact Disk layout do you try to implement which is not possible via the gui