You are than asked to give the number of a label, and you can add a translation to this label. You will also be asked to give a new colour number. Here you give a whole number from 1 till 15. As I can not see from here how you set the lower entries of your colour map, I can not predict what colour the label will get. In contrast to screen oriented labels, it is also possible to make world oriented labels.
World stands for the world at the screen.
These labels are handy if you want to put long texts in a plot, without having the text character crossing any atomic bonds for example. The informative value of these labels during working sessions is very low, since they are most of the times not readable at all. However, these labels are MOL-items, therefore you can do every thing with them what is possible with items in general. Thereafter you will be prompted for the mol object number and the mol-item name. All Alpha carbons in the given range will get the given text placed near to their alpha carbon.