DED on the VC404 (COPS10) Terminals The function keys have the following meanings: pf1 word right pf2 word left pf3 word erase (ie erase the word under the cursor) pf4 word rubout (ie erase the previous word) pf5 cursor down pf6 tail erase ( erase the line after the cursor) pf7 character erase (erase the character under the cursor) pf8 pf9 head erase (erase the line up to and including the cursor) pf10 pf11 special (see DED documentation) pf12 change mode (see DED documentation) the arrow keys have their appropriate meaning For detailed info on DED commands see the documentation in %s/ded/ded.1 Most of the function key assignments were in the original DED and were meant for a terminal with different key layout (ITT terminal I think). There are a few obvious problems: the word left and right functions are the wrong way around; and the cursor down key is in an awkward place. Another problem with DED is that it has very limited global edit facilities. In fact it is not possible to globally replace one string by another in one command. Instead you have to step through the text to each occurence of your string and change each one individually. For this purpose the normal editor is preferable. However for entering documents where you often want to correct an error noticed on the line above DED is great.