The maximum file size is set in php.ini in two different variables:
post_max_size
upload_max_filesizeSo, go ahead and edit the php.ini file look for these two variables and put the new limit you want to have. Save the file (upload it to your server if necessary) and restart Apache.
ProjectPier will display the lower value of the two, so you need to edit both values.
What if I can't edit the php.ini file?
If you use PHP as an Apache module, you have the ability to change some php settings through .htaccess. If the file doesn't exist, create a file called .htaccess in the root of your ProjectPier installation. Add the following to the file:
php_value post_max_size 20M
php_value upload_max_filesize 20MSee this page for more information.
What if I can't use the .htaccess file either?
In that case, you will need to contact your hosting provider to see if they can change that for you.