Hide Unhide a particular field based on roles using client side scripting

[Sangram]

@Varna

for column width check below thread

Column width in list view

Hello, I just deal with one already posted about, but for which no complete answers. As usual. In the list view (QUOTATION DOCTYPE) in which file can I change the colwidth columns so as to add another column. What file (full path please) can I change this? If you do not have the answer or you want to retain information, do not reply please.