Board
Display
I2C address
If the display stays dark, try the other address. It's often printed on the back of the module next to a solder jumper.
Panel color
Preview only. Two-color modules have a fixed yellow strip on the top 16 rows; the code is the same.
Clock source
Used by clock, date and dial widgets. The software clock needs no extra parts: it starts at the time you compiled the sketch and resets when power is lost. An RTC module keeps time on its own coin cell. Wire SDA to A4 and SCL to A5 on an Uno, or to GPIO 21 and 22 on an ESP32, and install "RTClib" by Adafruit from the Library Manager.
Templates
Loading a template replaces the current project but keeps your library, pins and clock settings. Undo brings your project back.
Save and share
Changes save automatically in this browser. Download a project file to back it up, hand it in, or open it on another computer.
Shortcuts
V R U C L T B P I pick tools. Arrows nudge the selection by 1 px, Shift+arrows by 10. Del removes it, Ctrl+D duplicates, Ctrl+Z undoes, Esc deselects. [ collapses or expands the tools panel.