Customizing Web Views

Is possible do customizations on webview? Like POS or Event Calendar

General answer: Maybe

Please specify the customizations you need.

Add a new field

Short answer is yes. But you should provide a specific use case so the community can provide a better, more helpful answer.

Here is, on Event Calendar page , I wanna show the owner of event(, instead description of event(Contact blablabla…) as you can see
Would be good too if possible remove the hour on left of description

This should be really easy…

Just take a look at the patient appointment doctype in the healthcare module in erpnext…You can configure what you want to see as the title of the event by “calling” the desired field on the get_events method on the python file and configuring the title value on the calendar js file for your doctype.