Column width resize in modern list

jhallal These is no Column Width option available under list settings > column settings page.

There are few new settings available to narrow/widen column like: 

This narrow downs the Title column a bit. However, it cannot narrow down it completely because there are some hidden options like ellipses ( ... ), share and list comments options which will be shown when you hover over the list item.

Workaround (using SharePoint JSON column formatting): You can use JSON column formatting like below for your Title column: 

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "txtContent": "@currentField"
}

After applying JSON column formatting, you can manually drag Title column width to narrow it down. Then save changes using Save view as option as mentioned in my answer here: SharePoint Modern List - Increase column width with JSON Issue 

Note: This will allow you to narrow down the Title column width (see below image). However, you will loose SharePoint default option given in above image (ellipses context menu, share, list comments, etc).  

Please click Mark as Best Response & Like if my post helped you to solve your issue. This will help others to find the correct solution easily. It also closes the item. If the post was useful in other ways, please consider giving it Like.

For SharePoint/Power Platform blogs, visit: Ganesh Sanap Blogs