Tachometer visual

Hi az38

I am new to this forum. I would have loved to provide you with a pic, but I will try to explain. 
Underneath the graphic, there is the callout value. If you diminish the dimensions of the graph, at a point, the value stops showing. I need to use the visualisation together with other graphs, so sometimes I need them to be rather small. 
I tried to make it show also when the visual is small. What puzzled me was that sometimes it did show, sometimes not, and I could not figure what made the difference, even though I systmatically checked all format settings to find where the visualistions differed. 
I think I can put in some additional visualisation, but I would prefer to make the tachometer show the value. 

Hopefully, that made it clearer what my problem is.