[Gvsig_english] option to disable/enable rendering?

[G. Allegri]

this feature is common in quite every desktop gis, but I don't know if
it's available in Gvsig.
When loading and managing big datasets it's very useful to
enable/disable the canvas rendering. Usually this feature is shown in
a canvas corner (qgis, arcgis, do it this way, in the lower-right
corner). Does gvsig miss this or is it located somwhere else?

Giovanni