Sometimes I encounter pointers to the middle of a structure, and the code uses a negative offset to refer to earlier code. This can result in assembly that looks like this, using MIPS as an example architecture:
In IDA Pro, I can highlight the "-0x4" part of that instruction and press T to open a new dialog that allows me to set a "delta" (the feature is described fully in detail here: http://www.hexblog.com/?p=63). If I knew that $s0 pointed to the 4th byte of a structure, I could set the delta to -4 and get something like this:
Is there an analogous way to operate on the middle of a structure in Ghidra?