When giving a presentation with a projector it is sometimes better to use a dual screen layout instead of a cloned display. If you still want a preview of the projector screen on your primary screen, you can do this:

Install x11vnc and a vnc viewer (e.g. xtightvncviewer).
Connect the projector.
In your system display settings, move the projector to the left or your primary screen (not strictly necessary, but I had weird clipping issues otherwise).
Start a vnc server for your second display with
```
x11vnc -clip xinerama0 -scale 0.8
```
(or xinerama1 for the second screen etc).
You can control zoom with the scale parameter.
Show the screen using vncviewer. Enter localhost as the server.
Get accustomed to how this behaves. Mouse movement is a bit weird, because your cursor will jump to your second monitor, as soon as you enter the vnc display.

Tobias Kraze

makandra.de

Say thanks

Last edit

Over 7 years ago

Tobias Kraze

License

Source code in this card is licensed under the MIT License.

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('s...

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Posted by Tobias Kraze to makandra dev (2016-11-23 11:19)

Giving a presentation with a dual screen layout on linux

Related cards:

Summary

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

Preparation

Introduction