I struggled for some time to find how to adjust the height of SharePoint 2010 Gantt chart (the default is, I think 500px). Scrolling causes problem, e.g. the predecessor links disappear with the tasks.
You’ll need to find the full ID of the appropriate …ListViewWebPartJSGrid element (there should only be 1 in the “view source”)
add this to a CEWP:
document.getElementById(“ctl00_m_g_eb20e5d1_cd50_4eda_ac31_7f2596d5e3d9_ListViewWebPartJSGrid”).style.height = “800px”;
…adjusting the px size as required, and it should fill your page
Percentage (e.g. 100%) doesn’t seem to work, as, I assume that it inherits this from a father element. If anyone knows how to make it work and/or amend the script to use a generic ListVew, please let me know
I expect that this works in 2013 also, if this is still a problem