Can I change the checklist layouts?

Yes – you do have a fair amount of control over the layout of checklists.
The checklist template ( in C:\Users\Public\Documents\TScoreX\Templates\ChecklistTemplate.xlsx ) comprises 4 worksheets – one for the Chair, ond for Marshals, one for TRA/DMT/TUM recording and one for SYN recording.
Each sheet has a small number of fixed rows that TScore copies for each flight.
Row 1 is the Flight header – this shows the Panel and Time and appears once on each page for a flight.
Row 2 is the class header. This is repeated within each flight at the start of each class.
Row 3 is the column header. This is repeated within each flight at the start of each class.
Row 4 is the athlete row. This is shown once per entrant, apart from on the recording sheets, where it may be repeated for each round of the competition.

You can change header labels and column sizes, fonts and appearance as you wish.
For the recording sheets though, there are some constraints. TScore knows the location of specific columns, which it will hide under some circumstances (e.g. if the Time of Flight column is not needed).
There are some special control cells on the sheets – these are in the top row.
Cell Z1 contains the template version number – this is so that TScore knows what to expect! Don’t change this.
Cell AA1 contains the ‘number of rounds per row’. Set this to 2 and TScore will expect to squeeze two sets of scores on one row.
Cell AE1 – contains the last column to be printed. TScore automatically sets the print area by checking this cell. If you want more columns on your sheets, change this value.

Note that if you swap to USA terminology, you will find the templates in the USA folder: C:\Users\Public\Documents\TScoreX\TemplatesUSA