[galaxy-user] How to find the alternatively spliced segment of genes in Cuffdiff output

Dear All, I have run programs from Tophat to Cuffdiff of Galaxy to look for the difference in alternative splicing events between cell types. However I do not know how to find the detail information (such as the sequence and the genomic coordinates) of the alternatively spliced part of a given gene. I looked at the data of Cuffdiff ouput " splicing differential expression testing", there is no column showing the position of alternatively spliced region. Please help to solve this problem. Thanks in advance. Jianguang Du