modify the x-axis values shown in chart visualization

I am working on PowerBI stacked Bar chart visualization. I want to change the values(labels) shown on x-axis.
Please see the image below, x-axis is starting from 0 and ending at 4(In the sample values are small so it is showing from 0 to 4).
How to change the x-axis value(labels) starting from 0,15,25.. or if i want to give it with decimals as 0.0,5.5,...I was seeing the options provided in Format painter but could not find the appropriate option which changes the values on x-axis.