A few days ago, I’ve decided to switch from Romaji input to Direct Kana input on my computer (using windows IME). Didn’t take me long to get accustomed to it, and I’m liking it a lot. However, I cannot figure out how to input a tilde. My physical keyboard is a standard Swiss layout, like in the following image (plus numpad and function keys).:
With Romaji input, I could type tilde by hitting the key below ESC (labeled § on my physical keyboard), but doing so with Direct Kana input produces ろ. As far as I can tell, no combination of shift, alt-gr and other keys produces a tilde.
Is there another way to input tilde on the Japanese Kana layout without having to resort to Alt-Codes (perhaps by editing the layout directly, which I’m open to doing if it’s plausible to do).