Edit the expression fields

You can edit an expression after you have added it to your chart. To edit an expression, expand the item you want to edit and select . You can edit either the Expression name or Alias.

Editing the Tag Name field

Select next to the tag name you want to edit.

Your expression will appear in the search field, where you can make any edits or updates to the expression. You can place your cursor at any point in the tag you want to replace and the search panel will update based on the cursor location.

Press Enter or select Save expression when you are done editing. The field will be updated.

Editing the Alias field

Select next to the alias you want to edit.

When creating a new alias, it's important to note that:

• You can't use the same name as another alias.

• You can't use special characters.

• Your alias can't be more than 512 characters.

Once you have updated the Alias field, press Enter.

Viewing the Units

The Units field displays the engineering units used for your expression.

The tooltip in the chart and the Cursor panel will display the units as well.

Selecting the Interpolation type

You can override the interpolation settings defined with expression tags using the Interpolation field. This option is available for expression tags displayed on the Line Chart only.

The following options are available:

Note: (Default) is used to indicate the default Interpolation setting of the data tag. This can be used to reset the data tag to the original state, if needed.

• Linear: Shows a smooth line. The value between two points is extrapolated in a linear line.

• Step Last (StairStep): Shows a step line. The horizontal part of the right-angle is drawn from the previous value, and the vertical part indicates the next value.