How to set auto width of column in RTF Template in oracle fusion

 Insert Table in the RTF template , Insert XML schema for columns. 

For example : 

Now click on individual cells and select TABLE PROPERTIES , click on Column and change the "Measure in:" : Percent 

We have Previous Column and Next column in the above screenshot, Click on next or previous and change the "Preferred Width" in %. It will change dynamically. 

Above screenshot is for Column1 and then we can navigate to further columns.

See below as example :