Customizing reports in QuickBooks Online (QBO) is a great practice in focusing the details that matters to you, Mohammad.
I recognized having the option to resize the width of the rows in your report is beneficial to you. Currently, this feature isn't possible in QBO.
As a workaround, you'll want to export your report to MS Excel and resize the rows width from there. I'd be glad to show you how.
- Go to the Reports menu.
- Select or type in the report you want to export in the search field.
- Click the Export icon at the top of the report.
- Select Export to Excel.

- Then save the file somewhere you can easily find.
You can also check this article for more details about the process: Export your reports to Excel from QuickBooks Online.
In addition to this, let me add this link that serve as your guide in running your reports seamlessly. This contains details on how to memorize, email, and print your reports in QBO: Run reports in QuickBooks Online.
I'm all ears if you have other queries about personalizing reports in QBO. You're always welcome to leave the details below and I'll take care of it for you. Have a good one!