diff --git a/src/main/scala/Components.scala b/src/main/scala/Components.scala
index 0136520..08ff3ab 100644
--- a/src/main/scala/Components.scala
+++ b/src/main/scala/Components.scala
@@ -1,4 +1,4 @@
-import cats.data.*
+import cats.data.{Store => *, *}
 import cats.effect.*
 import cats.effect.syntax.all.*
 import cats.syntax.all.*
@@ -12,6 +12,8 @@ import calico.syntax.*
 import scoin.*
 import snow.*
 
+import Utils.*
+
 object Components {
   def renderEventPointer(
       evp: snow.EventPointer
@@ -53,12 +55,83 @@ object Components {
       else None
     )
 
-  def renderEvent(event: Event): Resource[IO, HtmlDivElement[IO]] =
+  def renderEvent(
+      event: Event,
+      store: Store
+  ): Resource[IO, HtmlDivElement[IO]] =
     div(
       cls := "text-md",
-      List(("pubkey", event.pubkey), ("id", event.id), ("sig", event.sig))
-        .filter((_, v) => v.isEmpty)
-        .map { (label, _) => entry("property missing", label) },
+      if event.pubkey.isEmpty then
+        Some(
+          div(
+            cls := "flex items-center",
+            entry("missing", "pubkey"),
+            button(
+              Styles.buttonSmall,
+              "fill with a debugging key",
+              onClick --> (_.foreach { _ =>
+                store.input.set(
+                  event
+                    .copy(pubkey = Some(keyOne.publicKey.xonly))
+                    .asJson
+                    .printWith(jsonPrinter)
+                )
+              })
+            )
+          )
+        )
+      else None,
+      if event.id.isEmpty then
+        Some(
+          div(
+            cls := "flex items-center",
+            entry("missing", "id"),
+            if event.pubkey.isDefined then
+              Some(
+                button(
+                  Styles.buttonSmall,
+                  "fill id",
+                  onClick --> (_.foreach(_ =>
+                    store.input.set(
+                      event
+                        .copy(id = Some(event.hash.toHex))
+                        .asJson
+                        .printWith(jsonPrinter)
+                    )
+                  ))
+                )
+              )
+            else None
+          )
+        )
+      else None,
+      if event.sig.isEmpty then
+        Some(
+          div(
+            cls := "flex items-center",
+            entry("missing", "sig"),
+            if event.id.isDefined && event.pubkey == Some(
+                keyOne.publicKey.xonly
+              )
+            then
+              Some(
+                button(
+                  Styles.buttonSmall,
+                  "sign",
+                  onClick --> (_.foreach(_ =>
+                    store.input.set(
+                      event
+                        .sign(keyOne)
+                        .asJson
+                        .printWith(jsonPrinter)
+                    )
+                  ))
+                )
+              )
+            else None
+          )
+        )
+      else None,
       entry("serialized event", event.serialized),
       entry("implied event id", event.hash.toHex),
       entry(
diff --git a/src/main/scala/Main.scala b/src/main/scala/Main.scala
index ec53c34..06bf8f3 100644
--- a/src/main/scala/Main.scala
+++ b/src/main/scala/Main.scala
@@ -58,7 +58,7 @@ object Main extends IOWebApp {
             Event(
               kind = 1,
               content = "hello world"
-            ).sign(PrivateKey(randomBytes32()))
+            ).sign(keyOne)
               .asJson
               .printWith(jsonPrinter)
           )
@@ -90,9 +90,8 @@ object Main extends IOWebApp {
     div(
       cls := "w-full flex my-5",
       store.result.map {
-        case Left(msg) => div(msg)
-        case Right(event: Event) =>
-          renderEvent(event)
+        case Left(msg)                 => div(msg)
+        case Right(event: Event)       => renderEvent(event, store)
         case Right(pp: ProfilePointer) => renderProfilePointer(pp)
         case Right(evp: EventPointer)  => renderEventPointer(evp)
         case Right(sk: PrivateKey) =>
diff --git a/src/main/scala/Store.scala b/src/main/scala/Store.scala
index 7b73e34..7817602 100644
--- a/src/main/scala/Store.scala
+++ b/src/main/scala/Store.scala
@@ -4,6 +4,7 @@ import cats.effect.syntax.all.*
 import cats.syntax.all.*
 import fs2.concurrent.*
 import fs2.dom.{Event => _, *}
+import scoin.PrivateKey
 
 case class Store(
     input: SignallingRef[IO, String],
diff --git a/src/main/scala/Styles.scala b/src/main/scala/Styles.scala
index 42d756c..4a72181 100644
--- a/src/main/scala/Styles.scala
+++ b/src/main/scala/Styles.scala
@@ -3,5 +3,7 @@ import calico.html.io.*
 object Styles {
   val button = cls :=
     "shrink bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 mx-2 px-4 rounded "
+  val buttonSmall = cls :=
+    "shrink text-sm bg-blue-500 hover:bg-blue-700 text-white font-bold mx-2 px-2 rounded "
   val mono = styleAttr := "font-family: monospace"
 }
diff --git a/src/main/scala/Utils.scala b/src/main/scala/Utils.scala
index 6e2d257..7a64810 100644
--- a/src/main/scala/Utils.scala
+++ b/src/main/scala/Utils.scala
@@ -1,6 +1,10 @@
 import io.circe.Printer
+import scodec.bits.ByteVector
+import scoin.*
 
 object Utils {
+  val keyOne = PrivateKey(ByteVector32(ByteVector(0x01).padLeft(32)))
+
   val jsonPrinter = Printer(
     dropNullValues = false,
     indent = "  ",