How to ensure facebook posts youtube links on homepage

This was really bugging me!
Youtube has “share on facebook” button, but it would only post on my profile but NOT on the homepage which means nobody ever sees my links but me… POINTLESS!

Here is a screenshot showing the checkbox which needs to be ticked to share youtube videos on facebook

“Publish to Streams” MUST be ticked to work.

Thanks to Teresa Brusuelas Coburn on the facebook forums for posting the solution


Scanning a C41 negative

Most scanning software will allow you to do all of this using “auto” settings, but that is quite boring and I prefer to do things “manually” as it gives a greater level of control over the final result.

The first step is to scan the negative.

Most people will select “scan as a negative” as that is logical, but I’m going to select “scan as a slide” as this means the scanner will not make any atempt to adjust the colours and I will do all the colour correction in GIMP instead.

Here is a screenshot of the scan window, and the result is basically very orange, as a negative has a “mask” which causes it to be so orange.   It’s something to do with the dyes being “impure” and the orange mask has annoyed me till I figured out how to correct the colours!

scanning window

I have got my scanner software set up to import the image into GIMP directly, as this is simpler than having to save as a tiff first.

The next stage is to “invert” the colours in gimp to give this:


It is of course very blue, and this is the result of that annoying orange mask, as orange inverts to blue!

What we now need to do is to “tweak” the levels of each colour channel.
For each channel (red, green and blue) we are going to make 3 adjustments:
1) Black Point
2) White Point
3) Grey Point

The black and white points are done by looking at the histogram, as it’s obvious that the picture information is contained in a fairly narrow part of the colour channel, so lets move the settings so that the black and white points are where the picture data is:

First the red channel:
red channel

Then the green channel:
green channel

And finally the blue channel:
blue channel

Remember that you want to set the black and white points for all 3 channels FIRST and only when you have done this should you adjust each grey point.

The reason is that adjusting a grey point is a “fine” adjustment so you don’t even want to think about adjusting grey points till you have set the black & white points.

The final setting of grey points is where the “artistic” part comes in as you are tweaking the final look and “mood” of the image at this stage.

OK I have set black, white and finally grey points and this is what I get:

levels adjusted

Gone are those nasty colour casts, and the image looks quite “normal” in fact.

Remember this can all be done automatically so if you have loads of pictures to process then auto is the way to go, but it’s sometimes nice to know what the software is doing “under the hood” by doing everything manually.

Here is a link to the final picture as posted on

Cleaning a laptop screen

Photo-0079Laptops these days seem to mainly have glossy shiny screens, unlike the original laptops of a few years ago which were mainly matt.

The trouble with glossy screens is that smears & smudges seem to be far more obvious and annoying.

Cleaning a glossy screen and ending up without any smudges is not that easy, but by chance I discovered a cleaner called “Caloclean” made by Calotherm.

I originally purchased the Caloclean with the intention of cleaning my glasses with it, but it was not very good at cleaning glasses (I much prefer “Calocoat” for this job!).

It does however work a treat for cleaning a glossy laptop screen as it generates a very fine mist, so there is less risk of getting liquid where it should not be.

Calotherm also do a “Calocloth” microfibre cloth which is ideal for cleaning the screen after spraying on the Caloclean.

These products can be got from