readout tool with lens distorsion

[pierrelabreche]

Is this behavior unintended ?
When using the readout tool, the marker for the lens center disappears.

[jsachs]

The readout tool and other transformations that process clicking and dragging on the input or output image cannot both be active at the same time. The overlay with the center point is only displayed when lens distortion has control, so if you use the readout tool you need to click on the lens distortion dialog box to get control back and restore the center point overlay.