Data Entry FieldsKeyCreator \ General-Interface \ Data-Entry-Fields
When a prompt appears that has one or more data entry fields, a default value may appear in the field. Select ENTER to accept the default, or choose ACCEPT. To change the default, type in the new value and select ENTER to accept the value and move to the next data entry field.
A default is a value for numbers, conditions, or filenames that is already set. As a general rule, if you are ever unsure of what value to enter, it is recommended that you accept the default. Changes can always be made at a later time.
Within a data entry field, whenever you are asked for a value, you can use the On-line Calculator to evaluate algebraic expressions and set user-defined or system-reserved variables. For information on Online Calculator, see Calculator.
Note, also, that you can use the Online Calculator to convert units "on the fly." For instance, if you were to open an inches file and use the Create>Line>By Endpoints function and enter a Key in value of "25.4mm" (for the X coordinate), that value would then automatically be converted to "1" (inch). Such a conversion will occur for all units and anywhere that the calculator-type edit field is displayed. Similarly, if you were to open a millimeter file and use the Create>Line>By Endpoints function and enter a Key in value of "1in" (for the X coordinate), that value would then automatically be converted to "25.4" (mm).