Add-on to extend review period?

Add-ons
4

i don’t think you have to downgrade. i tested it on 2.1.28 and it worked. (was using 2.1 scheduler)

{
    "allow_lapse_grade": true,
    "button_text_prefix": "R: ",
    "cascade_easy_button": false,
    "disallow_filtered_decks": true,
    "enable_write_access": true,
    "hard_grade_threshold": 60,
    "keep_ease_factor": false,
    "lrn_modifier_buttons": [],
    "new_modifier_buttons": [
        [
            "New2X",
            "200"
        ],
        [
            "New3X",
            "300"
        ],
        [
            "New4x",
            "400"
        ]
    ],
    "rememorize_buttons": [],
    "rev_modifier_buttons": [],
    "show_answer_confirmation": false,
    "show_btn_time_in_days": false,
    "show_tooltip": true,
    "tooltip_duration": 1200,
    "young_card_ivl": 99999999
}

if you copy this and paste it in rememorize_btn's config, it’ll add 3 buttons to new cards and the number of buttons for other cards (learn, re-learn, review) will be the default number and won’t chnge.