Selecting Assignment names in Assignment editor of Quartus II

you can find the commands here (http://quartushelp.altera.com/11.1/master.htm#mergedprojects/tafs/tafs/tcl_list_of_packages.htm?gsa_pos=9&wt.oss_r=1&wt.oss=tcl%20qartus%20package), but I if you are starting to use scripting I would recommend making assignments using the GUI, and then study what changes were made in the qsf \ sdc \ qpf \ stp or any other type of script file Altera uses