Line y=x on dispersion chart

[DanielCasabuena]

hello, i have this table loaded in qlikview:

based on this table, i created a dispersion chart:

the  dimension is:

the expressions:

first expression: =Avg(RINDE1)

second expression: =Avg(RINDE2)

i wan to add a line Y=X across the chart but i do not know how to do. something like this:

in the example i draw a line but i need it included on the chart. is it possible? thanks!

[skamath1]

Under the Presentation Tab, explore the Reference Lines option

[DanielCasabuena]

yes, i had reviewed this section but, as i understand and have tested, it only allows lines that crosses perpendicular the axis. what i need is a function --> f(x)=x