Architectural signage and the providing of systems and methods for adjustable signage suitable for operation with one hand. A signage assembly may include a slider panel assembly having a back plate and a plurality of slider portions, where each of the slider portions may include a guidance tongue formed from a portion of the back plate. The guidance tongue may include a lock button extending from a front face of the guidance tongue, wherein the guidance tongue is configured to flex in a direction perpendicular to or from a front face of the back plate to allow insertion of a slidable tab with reduced interference from the lock button, and wherein the lock button is configured to mate with a lock pocket of a slidable tab when the slidable tab is fully extended.