Resolution, Sizing and Colour Space
To resize/check image size
Take the following steps in this order:
Resolution
Change the Resolution to 300
This is recommended but not obligatory.
For further explanation click HERE
Sizing
For Landscape Orientation make sure width is set to 1400 pixels and height will be set in proportion
Sizing
For Portrait Orientation make sure height is set to 1050 pixels and width will be set in proportion
When you come to Save this is the time to check you are saving as SRGB
Certain punctuation characters are not permitted within image titles. These are: _ # & / : ; ‘ * " ~ < > | ? \
For those wishing to use Lightroom see here