change directories and entities. how?

[IrinaG]

Hello, tell me in which folder is the directory "opportunity". Where to look to make edits to the code (which way)?

[eymen-elkum]

this depends on the changes you want, if you want to hook the save operation I prefer to go with this file

https://github.com/espocrm/espocrm/blob/master/application/Espo/Modules/Crm/Repositories/Opportunity.php

sometimes you need to make changes here:

https://github.com/espocrm/espocrm/blob/master/application/Espo/Modules/Crm/Services/CaseObj.php

for front-end related changes:
https://github.com/espocrm/espocrm/tree/master/client/modules/crm/src/views/opportunity/*

[IrinaG]

for front-end related changes:

https://github.com/espocrm/espocrm/tree/master/client/modules/crm/src/views/opportunity/*

in the navigation bar (contractors, contacts, calendars, etc.) how to change the names of the modules or templates themselves?
for example, "contacts" I want to replace with "raw"

[eymen-elkum]

note: changing these files directly will be not safe for upgrade