You can move any clip to a new location on the timeline by dragging it with the mouse. Holding ALT while dragging will also automatically scroll vertically through the video or audio tracks, depending where your mouse was positioned. By default the timeline will automatically scroll left and right while dragging a selection box. You can also drag a selection box around multiple clips to select them all.Holding CTRL while selecting clips enables you to select multiple clips.Selecting a different clip will deselect the first one. You can select single or multiple clips with the Select tool.
The Select tool is a multi-purpose tool that you can use for much of your basic editing, including: HitFilm’s editing tools are found on the left edge of the timeline. Once you have added clips to the timeline you will want to further refine your edit using the editing tools. I hope it helps you, these are some tips I would have liked to hear back in the day. This might seem obvious to some or even unnecessary, but when on low-spec hardware it can really help. Close everything running in the background that you don't need during your work. If you do not need to be online during edit, disconnect and turn of your antivirus (they may have noticable impact on performance sometimes). Close every other program when you're about to edit.
Now I have way better PC with GTX 1060 and 16 gigs of RAM and it still seems like it's not enough for some larger projects, so I have to use what I learned in the past sometimes. Being creative is kind of your best option here so use this "opportunity" to grow.
Learning how to parent to a point and using playceholders can help you too and is generally a good practice. So I hid the layer, moved it, waited for the image to change, checked if the position was right and if it was not, I did that again. once I wanted to use extrusion effect on a logo, but generating the preview basically froze the PC for around 10 seconds and it was impossible to position it. Even though I sometimes hated how my crappy old computer handled video editing, it helped me to get alittle bit more efficient and creative. It can really save time when rendering previews and can also help if you'Re doing some preformance heavy editing/compositing. When you finish a composite shot, pre-render it. It is btw a good practice to use these on more powerful pcs too, especially if you're working on a larger project.
You can set these in Options under Pre-Render tab (like where will be pre-renders stored etc. Than wait for some time depending on your pc speed and/or size of your clips. Just right click the clip and in the menu select "Pre-render -> Make Pre-Render(s)". These are basically files converted into format HitFilm likes more so it might work faster with them and it can really speed up your render. If you have time before the edit in which you do not need to use the pc and have enough disk space, create pre-renders.If you need it to some degree, try using the Start/End option, that shows them only on beginning and end of the clip. This may have a huge impact on performance but can be helpful during edit. It will disable the thumbnail images on timeline. In the Editor Sequence set Preview Mode to None. Still in Options, now under "Display".Under Render tab make sure "Use hardware decoding if available" is checked. Now we move to options (File-> Options).I'm using HitFilm Pro, so it might be slightly different, but Express 4 had these options as well, at least back in the day. Under the Viewer, change Playback Quality to something lower (Draft, Fastest, whatever works best for you).It reminds me back when I started learning video editing on my old low end laptop that really did not want mo to work with HD.