Drop down list auto selected first value

You can do this with the help of Javascript. Check this Stackoverflow post for inspiration.

Hi.

You can try assign the field value on Process record values event.

Could you please test it at your end. Its simple drop down on add page. Want first option auto selected instead of "Please select".
I tried tons of things but nothing is working.

Finally found the solution already covered by Admin.

$("select[id^='value_FIELD'] option[value='']").remove();

Write your field name, instead of FIELD.