how to

Tune the fling: strength, friction, edge stiffness, and elasticity

the short answer

flingdows has four live menu-bar sliders — fling strength, friction, edge stiffness, and elasticity — that control how far a thrown window travels, how fast it slows, how firmly edges resist, and how bouncy the spring-back is, so you can tune the feel from glassy to springy.

Most window managers have a fixed feel you either like or you don't. flingdows treats the physics as something you own: four sliders in the menu bar change how your windows behave in real time, so you can make a fling glassy and smooth or heavy and springy.

This guide explains what each control does and how they interact, so you can stop guessing and dial in exactly the motion you want.

4live physics sliders, adjustable in real time
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What each slider controls

Fling strength scales how much of your release speed becomes window velocity. Turn it up and a small flick sends a window flying; turn it down and you need a firmer throw. Friction sets how quickly a moving window slows down: low friction means long, glassy slides, high friction means the window settles quickly and close to where you let go.

Edge stiffness controls how firmly a screen edge pushes back when a window reaches it, and elasticity sets how bouncy that interaction is: at full elasticity a window overshoots and springs back with a visible bounce, at zero it eases in with no overshoot at all. Together they decide whether hitting an edge feels like a wall or a trampoline.

Dialling in a feel you like

For a calm, precise setup, keep fling strength moderate and friction high so windows go roughly where you aim with little drift, then drop elasticity so edges don't bounce. For a playful, slidey setup, lower the friction, raise the strength, and push elasticity up so windows coast far and spring at the edges.

Because the sliders update live, the fastest way to tune is to throw a window, nudge a slider, and throw again. If you overshoot, every setting resets to its default from the same menu.

how it works

  1. 01

    open the sliders

    Click the flingdows menu-bar icon to reveal the four physics sliders.

  2. 02

    set the throw

    Adjust fling strength and friction for how far and how long windows glide.

  3. 03

    set the edges

    Adjust edge stiffness and elasticity for how windows behave at screen borders.

  4. 04

    test and repeat

    Throw a window, tweak, and repeat; reset to defaults anytime if you overshoot.

frequently asked

Do slider changes apply instantly?
Yes. The four sliders update the physics in real time, so you can feel each change on your very next fling.
What's the difference between friction and elasticity?
Friction governs how a window slows while gliding; elasticity governs how bouncy it is when it hits a screen edge. One is travel, the other is the bounce.
Can I get back to the original feel?
Yes. There's a reset-to-defaults option in the menu that restores every slider at once.
Will my settings stick?
Your adjustments are saved, so the feel you tune is the feel you get the next time you launch flingdows.

Last updated June 6, 2026

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