Picking and labeling peaks in Sparky
From NMR Wiki
Switch to Find/add peak pointer mode
Click on the peak. A box around the peak should appear. If you don't see the box or it is too small increase box size
Type at.
A window prompting you to enter residue and atom assignment will show up.
Type in appropriate names and click 'Ok'. If you don't want to assign residue - just leave those fields blank (in that case peak label will contain ? mark)
Now a peak label should appear.
Peak assignments are stored in .save files. Make sure to save your spectrum.
Related commands
pi - peak intergrate
vc - view center
Pointer mode "find/add peak (F8)" with this mode clicking adds a peak or selects existing peak
pk - lock peak from moving
pu - unlock peak
xr - rotate view (change 2D plane shown) - this helps to make sure that peak label is placed on it's maximum - not just in the middle of one projection
at - assgning/labeling peaks
vt - in this dialog you can adjust what is shown on peak labels