I don’t think there is a way to do this by default. But you can use show to print with more digits
julia> df = DataFrame(x = rand(5) .* 1e-5 .+ 2000.9999)
5×1 DataFrame
Row │ x
│ Float64
─────┼─────────
1 │ 2001.0
2 │ 2001.0
3 │ 2001.0
4 │ 2001.0
5 │ 2001.0
julia> show(df; formatters = PrettyTables.ft_printf("%0.10f"))
5×1 DataFrame
Row │ x
│ Float64
─────┼─────────────────
1 │ 2000.9999090513
2 │ 2000.9999050430
3 │ 2000.9999021228
4 │ 2000.9999093119
5 │ 2000.9999020573