Unable to access the file esl.cfg:     This might be because esl.cfg is not in the root directory of C:. Copy the file    C:\ESL\ESL.CFG    to    C:\ESL.

Unable to access NOTEPAD:     This might be because the third line of c:\esl.cfg is incorrect. Find the exact path for NOTEPAD.EXE and put that in.

Unable to change font size in NOTEPAD:     I suggest that you use MSWord instead. See the next link.

You want to use MSWord instead of Notepad:     Replace the third line of esl.cfg with the path name for Winword.exe. For example,
   C:\PROGRA~1\MICROS~2\OFFICE\WINWORD.EXE

You get the message "you must be in Windows to access NOTEPAD":     This means that you are using ESL in purely DOS mode and hence must use a DOS text editor and the lpr program to print files. The easiest thing to do is to use ESLWIN within Windows and select ESTIMATE, INTERACTIVE, and TEXT-BOOK DATA.
If, however, you wish to use ESL in DOS mode, follow the steps below.
The ESL Update link has a text editor called RAMUEDIT.EXE and a three-page documentation called RAMUEDIT.txt. Download these into the C:\ESL directory, print RAMUEDIT.txt, and read how to use it. If you want to use that, you should change the third line in C:\ESL.CFG to
C:\ESL\ramuedit.exe. When you have finished a session, use the DOS command
   lpr   user\out.txt   >   lpt1
where lpr is the line printer program supplied with the disk, out.txt is the name of the file you want to print, and lpt1 refers to the printer.