Generally, adding a vertical line for the X-Axis is an infrequent requirement, however there are also two workarounds for it, for detailed steps please following these:
>>Method one: Adding a
Major gridline with interval e.g. 0.14 to the scatter chart
Right-click the scatter chart area’s gridline and then select Major Gridline Properties…
Set the value of Grid interval to 0.14 Line Width to 1pt line color to Black
Note: This method is not a common
workaround but suit for your special requirement, it has some limitations:
1)you have to set the Line width to 1pt line color to Black, as the Y-Axis will have the same layout to this Major gridline.
2)The maximum of the value on X-Axis must be less than the interval*2, otherwise there will be more than one Major Gridline.
Below picture is the report designed following the top method:
>>Method two: Drag a line
control to the scatter line directly. You could lay it at the place where you like, so it is very flexible. However, this method still have a limitation, the value on the X-Axis must be fixed, as the line’s location is fixed.
If you have any question, please feel free to ask.