Abstract: A mounting for a heavy signboard which must be held in each of a generally vertical display position and a generally horizontal travel position, including support means which are laterally spaced and which are rotatably connected to the signboard at a position in which the signboard is substantially balanced when in positions other than vertical, and a control rod supportingly connected to the signboard by which the signboard can be manually controlled from a location spaced from the signboard for controlled movement into and between those held positions, and support means latchingly and releasably retainingly engageable with the control rod when the signboard is in each of those positions for holding those positions, the control rod thus serving as both a manually controlled control handle for the signboard and a latch member for releasably holding the signboard in both its vertical and horizontal positions.