# Perform en masse operation

If you have selected a range before applying an operand conversion command, IDA will display a dialog box.

You can choose a range of operands to perform an en masse operation:

```
 ALL OPERANDS
 -----------
```

The operation will be performed on all operands as a toggle. For example, if you ask to convert to a character, then all non-character operands will become characters, and all character operands will become non-chars.

```
 OPERAND VALUE RANGE
 -------------------
```

The operation will be performed on the [void](https://docs.hex-rays.com/9.0sp1/user-guide/user-interface/search#search-for-next-suspicious-operand) operands which contain immediate numbers in the specified range.

```
 ... OPERANDS
 ------------
```

This selection will convert all operands with the specified type to undefined operands. Example: all characters become non-characters.

```
 NOT ... OPERANDS
 ---------------
```

This selection allows to convert all operands that do not have the specified type to the specified type. Example: all non-characters to characters.

```
 NOT TYPED OPERANDS
 -----------------
```

This selection allows to convert all operands without any type to the specified type. Example: all operands with no type to characters.

```
 APPLY ONLY IF POSSIBLE
 ---------------------
```

IDA will check whether an operand can be represented with the specified type (as a character constant, for example), and perform type conversion only if the check is successful.