[v10.4.x] Docs: add unit scaling clarification (#85871)

Docs: add unit scaling clarification (#85830)

* Added unit scaling information

* Edited

(cherry picked from commit d666b92)

Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>

docs/sources/panels-visualizations/configure-standard-options/index.md

@@ -84,6 +84,10 @@ You can also paste a native emoji in the **Unit** drop-down and select it as a c
 
 ![A time series visualization using custom thumbs up emoji units](/media/docs/grafana/panels-visualizations/thumbsup_panel_v11.0.png)
 
+#### Control unit scaling
+
+By default, Grafana automatically scales the unit based on the magnitude of the value. For example, if you have values of 0.14kW and 3000kW, Grafana displays them as 140W and 3MW, respectively. You can use custom units to control this behavior by setting a prefix, suffix, or custom SI unit.
+
 #### String units
 
 Sometimes Grafana is too aggressive in interpreting strings and displaying them as numbers. To configure Grafana to show the original string value, select **Misc > String** in the **Unit** drop-down.