You may rename your sample at this time. The sample is not retained in the instrument's memory. Once a sample has been recorded, it can be edited. You may select to loop or not loop, select the type of loop, position the Alt. Sample Play Pointer before or after the loop, decide whether or not the sample should ignore release, and designate the sample rate and length.
TRIM adjusts the sample start and end points.
DSP, short for digital signal processes, provides access to the myriad of functions for editing samples. LINK allows you to lock together different fields in the sample editor so that adjusting one will adjust all parameters that have been linked by the same amount. This is great for moving simultaneously the start and end points of a loop, or adjusting the sample start and Alt.