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Interactive slides: levers, sliders, scenarios

liveForTeaching staff

Sliders and levers on the slide change everything bound to them live — numbers, bars, markers, colours, visibility. Operable while presenting with mouse, finger, keyboard, from the phone, by voice and with gestures.

Try it yourself

Why#

A slide with key figures should not only show but answer: “What if the contribution margin falls?” Instead of a second slide you move the slider — break-even tile, marker on the timeline, payback period and footnote move along.

How it works#

Click pathCourseContentSlidesEdit largeInsertLevers & sliders

  1. 1In the slide editor under “Insert” → “Interactive” → “Levers & sliders” open the panel.
  2. 2“+ Lever”: define name (for formulas), display name, minimum, maximum, step, start value, unit and format; the slider next to it shows the value immediately.
  3. 3“+ Formula”: derived quantities such as “breakeven = kosten / db” — the value is shown live next to it, errors (e.g. circular reference) in red instead of a crash.
  4. 4Select an element on the slide → in the design bar “Bind to lever” (or in the panel “Bind selected element”) → choose the property → set expression and mapping.
  5. 5“Insert control” (slider, rotary knob, plus/minus, toggle, choice chips, number field) or “Insert chart” (bar, line, pie with expressions as data points).
  6. 6Scenarios: “Current values as scenario”, rename, mark as plan with ★; “Back to plan” leads there. Scenarios cross-fade softly.
  7. 7Quick start: template “Business model (interactive)” — key figure tiles, timeline with break-even marker, sliders and scenarios.
  8. 8Presenting: operate sliders on the slide; in the presenter view the lever console has all sliders, scenarios, undo, voice command, camera gestures and “Phone as remote control” (QR code).

Settings and switches#

  • Switchable per tenantDefault: onModule: Kurs-Studio
  • Switchable per tenant (feature “Interactive slides”, default on). Off: slides show their saved values, nothing is operable, the “Levers” panel is missing, the phone page does not respond.
  • Part of the module “Course Studio”.

Levers and formulas#

A lever is a number with a range and a grid (e.g. contribution margin 200–900 €, step 10). Formulas calculate further from it and may build on each other. A formula that needs itself by a detour is reported as a “circular reference” — the slide then shows a warning sign instead of a number, nothing crashes.

Formulas are never executed as program code: a small calculator of its own knows only numbers, names and the functions listed. A guard in the code ensures this.

Renaming a lever carries through everywhere: formulas, scenarios, bindings, controls and charts.

What can be bound#

  • Text with placeholders (numbers visibly count along when changing)
  • Position left/top — e.g. a marker on a scale between minimum and maximum
  • Width/height — bars and progress bars
  • Rotation — pointers and gauge needles
  • Opacity and visibility — show or hide from a threshold
  • Fill, text, background and border colour — as a gradient between two colours or with a threshold (below X red, otherwise green)
  • Font size and border width
  • Emphasis: the element pulses while a condition holds

Mappings: “Value directly”, “Range → range” (e.g. 136 … 1,400 participants → 10 … 90 % of the slide width), “Gradient”, “Threshold”.

Presenting live: console, phone, voice, gestures#

Every operation — slider, console, phone, voice command, gesture — is the same command at the core of the editor. That is why there is “Undo” everywhere, and audience window, presenter view and phone show the same state.

Phone: in the presenter view choose “Phone as remote control” and scan the QR code. The phone needs no sign-in; the random address is the key. Only lever names and numbers are transmitted.

Voice: recognition via the platform's EU service; without it there is no fallback to another service. Camera gestures: only after being explicitly switched on, evaluated only in the browser — no image leaves the device.

Limits#

  • At most 24 levers, 40 formulas and 8 scenarios per slide; expressions up to 500 characters.
  • PPTX and PDF export show the saved state as a still image.
  • The camera only recognises the fist with the hand model on its own server; without it, up, down and swipe work.
  • Fellow learners in “Live co-learning” see the slide with their own sliders, not the presenter's values.

Tips#

  • Placeholders in text: {{breakeven|≈0}} inserts the value; after the bar the format — “0 €” (7,500 €), “≈0” (≈ 310), “T0 T€” (172 k€), “1 %”, “/10” rounds to tens, “+0” shows the sign.
  • Formulas: + − × ÷ ^, brackets, min, max, round (runden), round up (aufrunden), round down (abrunden), abs, square root (wurzel), clamp (begrenzen), sum (summe), mean (mittel), if (wenn(condition; then; else)), comparisons, and/or/not.
  • Voice (button “Speak” in the console): “contribution margin to 600”, “fee plus 50”, “costs minus 10 percent”, “scenario ambitious”, “back to plan”, “undo” — in German and English.
  • Gestures: hand up/down changes the selected lever, swiping selects the next lever (then the scenarios), fist holds, open hand releases. On the screen: drag vertically with two fingers or swipe horizontally.
  • Nothing is saved while presenting: the values apply until “Back to plan” or reloading. Values set in the editor are saved.

Try it yourself#

Scan the QR code or press the button

A trial access is created automatically and disappears after a day — no sign-up.

Try it yourself

https://uds-system.de/plattform/probe?ziel=%2Fstudio%2Fkurs

Related features#