Split-Screen View

View two PDFs side by side. Compare legend sheets while counting, or reference architectural drawings alongside electrical plans.

Overview

Split-screen divides your workspace into two panes:

• Main pane (left): Your active working area with full editing
• Reference pane (right): Read-only view for comparison

Enabling Split-Screen

1. Click the split icon in the floating zoom controls (bottom-right)
2. The screen divides into two panes
3. Click again to disable

The split icon highlights orange when split-screen is active.

Using the Reference Pane

Select a PDF

The reference pane can show:

• A different page of the same PDF
• A completely different PDF from your project

Use the page navigation or PDF selector in the reference pane header.

Navigation

The reference pane supports:

• Pan: Click and drag
• Zoom: Scroll wheel or zoom controls
• Page navigation: Use the page controls
• Minimap: Navigate large drawings quickly

Read-Only Mode

The reference pane displays a "Reference Screen - View Only" badge. You cannot:

• Edit detections
• Draw zones
• Add annotations
• Modify any content

All editing happens in the main pane.

Resizing Panes

• Drag the divider between panes to adjust the split ratio
• The ratio persists across sessions
• Minimum pane width is enforced (300px)

Synchronized Content

Some settings sync from the main pane to the reference pane:

Synced	Not Synced
Detection visibility	Current page
Zone visibility	Zoom level
Legend settings	Pan position
Excluded pages display	Tool selection

Use Cases

Legend Reference

1. Open split-screen
2. Navigate reference pane to the legend sheet
3. Work on electrical plans in main pane
4. Cross-reference symbol definitions easily

Floor Comparison

1. Open split-screen
2. Set main pane to current floor
3. Set reference pane to another floor
4. Compare layouts and counts

Architectural Overlay

1. Upload both electrical and architectural PDFs
2. View architectural in reference pane
3. Count symbols in main pane with context

Tips

• Use split-screen when you need to reference another page frequently
• The reference pane is perfect for legend sheets
• Disable split-screen when you need maximum drawing space
• Your split ratio preference is remembered

Keyboard Shortcuts

Key	Action
(none)	Toggle via toolbar button

INFO

Split-screen toggle is available via the toolbar button only. The keyboard shortcut may be added in a future update.