How can i set plus operator from dot to X in MP3.1?

> How can i set plus operator from dot to X in MP3.1?

"plus" ?? Guess you mean multiplication.

Unfortunately there is no way to do this.

You can't change the appearance of the operators in Prime.

You also can't change the appearance of the derivative operator to a partial derivation, you cannot hide keywords in symbolic evaluations, nor can you make the assignement operator := look like a normal =. You cannot ....

There are so many useful things we are used from real Mathcad which we cannot do in shabby Prime. So few reasons to switch to Prime, so many reasons to stay with Mathcad15 (or 11).

Valery seems to be very optimistic when he hopes for Prime 7.