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(Image: Screenshot by JA Watson/ZDNet)
Because I chose "Something else" in the previous screen, ubiquity now takes me to this disk partitioning screen. This shows the current partitions with their sizes, both in the table and in the colored graphic display at the top of the window.
Unfortunately, when the partition layout is large and/or complex, the graph is not scaled, so it just shows the first part, and then runs off the edge of the window. That is not a problem, but it can be confusing if you haven't seen it before — I just ignore it.
This screen is where I think the Ubuntu installation with UEFI gets a bit confusing. It shows the EFI Boot partition, and has it correctly labeled as efi in the "type" column, but it gives absolutely no indication that it is actually going to do anything with that, or for that matter, it is not even obvious that it is going to make a UEFI-compatible installation at all.
There is a column labeled "mount point", and it doesn't show that the efi partition will be mounted, but in fact, when the installation in complete, that is what will happen, and I don't need to do anything here about it. It just occurred to me that the same is true of the swap partition, it is labeled correctly, but there is no indication that it will be properly configured and used, but it will be. Oh well, I just press on and see how it turns out.
In fact, the only thing I need to do here is designate the root partition, which is shown in the next screenshot.