Majoor Floating Viewer

A dedicated MFV guide should show the full workflow, not only one feature at a time

This visual walkthrough presents the floating viewer as a single working surface: compare modes, pin slots, overlay controls, streams, node tools, run/stop actions, and pop-out workflow all fit into one compact panel.

Compare + pins
Format + guides
Live + node + KSampler streams
Node params + run/stop + pop-out
Simple
A/B
Side
Grid
Graph
A Pin
B Pin
Live Stream
KSampler Preview
Node Stream
Guides
Format
Pop Out
MFV surface · output / shot_0248.mp4
Format 2.39:1 · Guides on
00:14 / 00:2124 fps · Compare ready

What the toolbar actually covers

Modes
5
Pin slots
A/B/C/D
Streams
3
Pop-out
Desktop-ready

Why a dedicated guide helps

MFV is no longer just a floating preview. It is a compact workflow cockpit. A dedicated document is the cleanest place to explain how compare, pins, overlays, streams, parameters, and run controls fit together.
Compare And Pins

Compare modes and pin slots are the center of fast visual iteration

Use compare modes to switch context, then lock references with A/B/C/D pins so new generations can be judged against a stable baseline.

Simple
A/B
Side-by-side
Grid compare

A/B compare

Toggle between two states to spot subtle prompt or sampler changes.

A baseline
B candidate
A pinned
B live

Side-by-side

Keep both assets on screen while zoom and pan stay synchronized.

Vertical split
A pinned
B pinned

Grid compare with four references

Pin up to four outputs and review a full sweep at once.

A pinned
B pinned
C pinned
D pinned
A
B
C
D

Pin behavior in practice

Baseline lock
Pin your best result in A and let Live Stream replace only the unpinned slot.
Prompt sweep
Keep A/B/C/D locked while reviewing different prompt or sampler passes in grid compare.
Before / after
Use A as the original and B as the current variation while stepping through new runs.
Streams

Live Stream, Node Stream, and KSampler Preview solve three different monitoring jobs

The key to using MFV efficiently is understanding which stream follows final outputs, which one follows selected nodes, and which one shows denoising steps during execution.

Final outputs
Selected node media
Execution preview frames

Live Stream

Follow the newest generated asset automatically after each run finishes.

Latest output · queue item 1287
new output visibleauto-follow on
Best for
Watching final generations complete without touching the grid.
Does not do
It does not follow canvas node selection. That is Node Stream.

Node Stream

Preview frontend media exposed by the node you click in ComfyUI.

Selected node · PreviewImage #58
node media attachedselection follow
Best for
Jumping to loader, preview, ImageOps, or save nodes that already expose frontend media.
Limit
No frontend media means nothing to display, even if the backend node exists.

KSampler Preview

Show denoising-step frames while the workflow is still running.

Best for
Watching execution evolve before the final file is written.
Different from
It streams sampler preview frames, not selected-node media and not final output follow.
Controls And Actions

Format, guides, node parameters, run, stop, and pop-out turn MFV into a compact workflow cockpit

The dedicated MFV doc should explain how display overlays and workflow actions live side by side: tune the viewing surface, inspect node values, queue a prompt again, stop execution, or move the viewer into a separate window.

Format + guides
Node parameters
Run / stop
Pop-out

Node Parameters

Edit the workflow node that produced the current result without leaving MFV.

Sidebar open
Run
Stop
Graph Map
Pop Out
positive
cinematic portrait, glass reflections, moody contrast
seed
472198120
steps
24
cfg
6.5
sampler
dpmpp_2m_sde_gpu
scheduler
karras
Right
Default sidebar
Left
Canvas-friendly
Bottom
Wide review mode

Format and guides overlays

Viewer overlaysFormat 2.39:1 · Rule of thirds · Safe area
Format
Use framing overlays to preview the target crop or presentation ratio.
Guides
Turn on thirds and safe-area guides when you want composition help during comparison.

Pop-out workflow

Main ComfyUI windowMFV docked
Second-screen pop-outMFV detached
Run is for fast iteration from the viewer. Stop is for aborting the current generation. Pop-out is for moving MFV to a second screen or keeping it detached while ComfyUI stays on the main canvas.