Thanks Jeff.  You have explained the process simply and I now understand how it works and where I went wrong. ... View more

Hi Jeff: The sources are both HD and SD in widescreen.  I was using clips from past videos i made, to make a new music video.  But when I exported the final product (without using sequence settings, I just used the first screen that came up "New Project" but it did not give me a choice to choose between 4:3 or 16:9) it came out in 4:3.  Then I redid the exporting by first changing the sequence settings for one clip of SD and it came out in widescreen but the video only covered a small portion of the field. In my CS5 Premiere Pro, I could choose widescreen 16:9 before entering the project.  Can't you do this also with Premiere Pro CC 2017? Thanks Frank ... View more

Hi Neil: When I opened the Sequence/Settings it was greyed out. So I had to place an asset in the timeline and click on. Then it opened up and I changed it to ACHDV 1080i anamorphic 1440 x 1080 but when I exported it using H.264 it did not fill the screen. Adobe stated:You set the frame and pixel aspect ratios for a Premiere Pro project when you create it. Once these ratios are set, you cannot change them for that project. CS5 did this before I started the project. On Mon, Mar 6, 2017 at 7:09 PM, R Neil Haugen <forums_noreply@adobe.com> ... View more