Function screen_size 

pub fn screen_size(
    ctx: &Ctx,
    set: Option<(u16, u16)>,
    commit: bool,
    index: u16,
    wait: u64,
    p: &mut dyn Progress,
) -> Result<(u16, u16)>

Show the record, and optionally set the geometry it carries. Returns the geometry the card holds when the command finishes.

Errors

Fails if the card does not answer or the write is refused.