Temporary keyboard having some individual keys that provide varying levels of capacitive coupling to a touch-sensitive display

An apparatus for use with a touch-sensitive display, the apparatus comprising:

• a physical keyboard configured to temporarily overlay the touch-sensitive display and comprising a plurality of individual keys, each of the plurality of individual keys comprising a keycap, wherein the plurality of individual keys are configured such that:
• each individual key provides a first level of capacitive coupling to the touch-sensitive display when a user depresses an individual key to thereby communicate to the touch-sensitive display a selection of that individual key;
• and
• each individual key provides a second level of capacitive coupling to the touch-sensitive display when a user touches but does not depress the individual key to thereby communicate to the touch-sensitive display an input instruction other than a selection of that individual key, the input instruction comprising a user's sideways-sliding gesture across the keycaps of many adjacent ones of the plurality of individual keys, the user's sideways-sliding gesture generating the second level of capacitive coupling at each of the many adjacent ones of the plurality of individual keys,
• wherein the second level of capacitive coupling is different from the first level of capacitive coupling.