Stefan's Tools

Useful open source tools that make your life easier

DemoHelper

DemoHelper Icon

A tool which helps in demonstrations, presentations or if you just need to explain someone something on your computer.

DemoHelper is an annotation and screen zoom tool you can use for technical presentations that include application demonstrations.

DemoHelper runs unobtrusively in the system tray and is activated by either customizable hotkeys or the context menu of the tray icon.

You can draw on the screen to mark special areas, or you can zoom in on an area on the screen.

Use cases include meetings where you have to explain something on the screen or teachers presenting lectures to students in computer classes.

DemoHelper runs on Microsoft Windows 2000 and later.

Basic operation

DemoHelper runs in the system tray, where you can activate and configure it with a simple right-click:

DemoHelper Context Menu

In the options dialog, you can configure the hotkeys for the two main modes of operation: zooming and drawing.

DemoHelper Options

To start the drawing mode, either press the hotkey you configured for it, or doubleclick on the icon in the system tray. Once in drawing mode, you can draw on the screen:

DemoHelper Example

As shown in the screenshot above, it's possible to draw arrows and lines in different colors. Also a special "Marker" is available to highlight areas on the screen, as done above with the "file2.*" filenames.

The colors are merged together with the screen by default. But it's possible to draw with solid colors if needed.

Keyboard shortcuts

Zooming Mode

up
zooms in
down
zooms out
enter or left mouse click
activates drawing of the zoomed area
escape
cancels zooming mode
Zooming is also possible using the mouse wheel.

Drawing Mode

up/down or Ctrl-Mousewheel
increases/decreases the size of the drawing brush
right or Mousewheel
cycles through the available brush colors
0-9
select the brush colors
Shift while drawing
forces horizontal/vertical drawing
Control while drawing
drawing straight lines
right mouse-drag
draws arrow lines
right mouse-drag with control key pressed
draws straight lines
escape
quits drawing mode
backspace
removes the last line drawn
delete
removes the first line drawn
E
removes all drawn lines
M
toggles the marker on/off
T
toggles between solid and merged drawing
Z
select a rectangle to zoom in
C
clears the screen with the background color

Now go to the download page.