Schematic Editor — Overview¶

The Schematic Editor is where you design your circuit: place components, draw wires, assign net labels, and prepare for PCB layout.

What You Can Do Here¶

Task	Tool
Place components from libraries	Library panel → Double-click
Draw wires connecting pins	Wire tool (`W`)
Assign net labels (SDA, SCL, +3V3…)	Label tool (`L`)
Place power symbols (GND, VCC)	GND / VCC toolbar buttons
Draw annotations (boxes, text, lines)	Line, Rect, Text tools
Edit component properties	Properties panel
View net connectivity	Built automatically as you draw

Workspace¶

The schematic workspace consists of:

┌──────────────────────────────────────────────────────────────┐
│  [Select][Wire][Label][Text][Line][Rect][Circle][GND][VCC]  │  ← Toolbar
│ · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  │
│ · · ┌───────────────────────────────────────────────┐ · · · │
│ · · │                   A4 Page                     │ · · · │
│ · · │                                               │ · · · │
│ · · │   R1         D1 (LED)      U1 (MCU)           │ · · · │
│ · · │   ┤├──────────>|──────────[STM32]             │ · · · │
│ · · │        330Ω              SDA SCL              │ · · · │
│ · · │                                               │ · · · │
│ · · └───────────────────────────────────────────────┘ · · · │
└──────────────────────────────────────────────────────────────┘

Canvas — dot grid with an A4 page outline (configurable to A3, custom). Place all components and wires here.
Toolbar — floating tool buttons above the canvas
Library panel — symbol list for placing components
Properties panel — edit properties of the selected item or page settings

Each toolbar button activates a drawing mode that determines how mouse clicks are interpreted:

Mode	Button	Behavior
`Select`	▷ Arrow	Click to select, drag to move, drag box to multi-select
`Wire`	─ Wire	Click to start / add corners / end a wire
`Label`	🏷 Label	Click to place a net label
`Text`	T Text	Click to place a text annotation
`Line`	╱ Line	Click start → drag → release
`Rectangle`	□ Rect	Click one corner → drag to opposite
`Circle`	○ Circle	Click center → drag to set radius
`Arc`	⌒ Arc	Click to define arc points
`Polygon`	⬠ Polygon	Click vertices → right-click to close
`Junction`	• Dot	Click to place junction dots manually
`GND`	⏚ GND	Click to place a GND power symbol
`VCC`	↑ VCC	Click to place a VCC power symbol

The active tool is highlighted cyan. Press Esc to return to Select mode at any time.

Basic Interactions¶

Selecting objects¶

Action	Input
Select a single component	Left-click on it
Select multiple objects	Drag a selection box on empty canvas
Open context menu	Right-click any object
Cancel current operation	`Esc` or right-click
Delete selected	`Del` or `Backspace`
Undo / Redo	`Ctrl`+`Z` / `Ctrl`+`Y`

Smart interactions¶

Dragging a component — connected wires follow automatically, no broken connections
Rotating (R) — component rotates 90°, wires adjust to the new pin positions
Deleting a component — connected wires are also removed (fully undoable)

Section Pages¶

Continue to the detailed guides for each aspect of schematic design:

Page	What you'll learn
Placing Components	Load libraries, place symbols, edit designators
Wiring & Nets	Draw wires, connect pins, net labels, GND/VCC
Properties & Attributes	Edit page settings, component attributes, text
Graphics & Annotations	Draw boxes, lines, annotations