*Created originally on Bitbucket by [wgurr (Walter Gurr)](https://bitbucket.org/%7B650d81e2-d7e1-48aa-a716-0d5a5ec30911%7D/)* Excel uses the `<u\>` tag for underline, however this tag appears to not recognized by openpyxl. For example this does not come in with an underline from the openpyxl parser: ``` #!xml -<font> <u/> <sz val="11"/> <color rgb="FF0000FF"/> <name val="Calibri"/> </font> ``` When openpyxl sets underline in it's output it uses `<u val="single"/>`. This is accepted by Excel, but when Excel saves it reverts to `<u/>'. ``` #!xml -<font> <color rgb="000000FF"/> <u val="single"/> </font> ``` I'm using Excel 2010 and openpyxl 2.4.5.